static int command_abort(struct scsi_cmnd *srb)
{
struct Scsi_Host *host = srb->device->host;
struct rtsx_dev *dev = host_to_rtsx(host);
struct rtsx_chip *chip = dev->chip;
printk(KERN_INFO "%s called\n", __FUNCTION__);
scsi_lock(host);
if (chip->srb != srb) {
scsi_unlock(host);
printk(KERN_INFO "-- nothing to abort\n");
return FAILED;
}
rtsx_set_stat(chip, RTSX_STAT_ABORT);
scsi_unlock(host);
wait_for_completion(&dev->notify);
return SUCCESS;
}
/* First stage of disconnect processing: stop all commands and remove
* the host */
static void quiesce_and_remove_host(struct rtsx_dev *dev)
{
struct Scsi_Host *host = rtsx_to_host(dev);
struct rtsx_chip *chip = dev->chip;
/* Prevent new transfers, stop the current command, and
* interrupt a SCSI-scan or device-reset delay */
mutex_lock(&dev->dev_mutex);
scsi_lock(host);
rtsx_set_stat(chip, RTSX_STAT_DISCONNECT);
scsi_unlock(host);
mutex_unlock(&dev->dev_mutex);
wake_up(&dev->delay_wait);
wait_for_completion(&dev->scanning_done);
/* Wait some time to let other threads exist */
wait_timeout(100);
/* queuecommand won't accept any new commands and the control
* thread won't execute a previously-queued command. If there
* is such a command pending, complete it with an error. */
mutex_lock(&dev->dev_mutex);
if (chip->srb) {
chip->srb->result = DID_NO_CONNECT << 16;
scsi_lock(host);
chip->srb->scsi_done(dev->chip->srb);
chip->srb = NULL;
scsi_unlock(host);
}
mutex_unlock(&dev->dev_mutex);
/* Now we own no commands so it's safe to remove the SCSI host */
scsi_remove_host(host);
}
/* Command timeout and abort */
static int command_abort(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
US_DEBUGP("%s called\n", __FUNCTION__);
/* us->srb together with the TIMED_OUT, RESETTING, and ABORTING
* bits are protected by the host lock. */
scsi_lock(us_to_host(us));
/* Is this command still active? */
if (us->srb != srb) {
scsi_unlock(us_to_host(us));
US_DEBUGP ("-- nothing to abort\n");
return FAILED;
}
/* Set the TIMED_OUT bit. Also set the ABORTING bit, but only if
* a device reset isn't already in progress (to avoid interfering
* with the reset). Note that we must retain the host lock while
* calling usb_stor_stop_transport(); otherwise it might interfere
* with an auto-reset that begins as soon as we release the lock. */
set_bit(US_FLIDX_TIMED_OUT, &us->flags);
if (!test_bit(US_FLIDX_RESETTING, &us->flags)) {
set_bit(US_FLIDX_ABORTING, &us->flags);
usb_stor_stop_transport(us);
}
scsi_unlock(us_to_host(us));
/* Wait for the aborted command to finish */
wait_for_completion(&us->notify);
return SUCCESS;
}
/* Command timeout and abort */
static int command_abort(struct scsi_cmnd *srb)
{
struct Scsi_Host *host = srb->device->host;
struct rtsx_dev *dev = host_to_rtsx(host);
struct rtsx_chip *chip = dev->chip;
dev_info(&dev->pci->dev, "%s called\n", __func__);
scsi_lock(host);
/* Is this command still active? */
if (chip->srb != srb) {
scsi_unlock(host);
dev_info(&dev->pci->dev, "-- nothing to abort\n");
return FAILED;
}
rtsx_set_stat(chip, RTSX_STAT_ABORT);
scsi_unlock(host);
/* Wait for the aborted command to finish */
wait_for_completion(&dev->notify);
return SUCCESS;
}
static void quiesce_and_remove_host(struct us_data *us)
{
struct Scsi_Host *host = us_to_host(us);
//---------------------------
pr_info("17 quiesce and remove host\n");
/* If the device is really gone, cut short reset delays */
if (us->pusb_dev->state == USB_STATE_NOTATTACHED) {
set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
wake_up(&us->delay_wait);
}
/* Prevent SCSI scanning (if it hasn't started yet)
* or wait for the SCSI-scanning routine to stop.
*/
cancel_delayed_work_sync(&us->scan_dwork);
/* Balance autopm calls if scanning was cancelled */
if (test_bit(US_FLIDX_SCAN_PENDING, &us->dflags))
usb_autopm_put_interface_no_suspend(us->pusb_intf);
/* Removing the host will perform an orderly shutdown: caches
* synchronized, disks spun down, etc.
*/
scsi_remove_host(host);
/* Prevent any new commands from being accepted and cut short
* reset delays.
*/
scsi_lock(host);
set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
scsi_unlock(host);
wake_up(&us->delay_wait);
}
/* This is always called with scsi_lock(srb->host) held */
static int device_reset(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
int result;
US_DEBUGP("%s called\n", __FUNCTION__);
if (us->sm_state != US_STATE_IDLE) {
printk(KERN_ERR USB_STORAGE "Error in %s: "
"invalid state %d\n", __FUNCTION__, us->sm_state);
return FAILED;
}
/* set the state and release the lock */
us->sm_state = US_STATE_RESETTING;
scsi_unlock(us_to_host(us));
/* lock the device pointers and do the reset */
down(&(us->dev_semaphore));
if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
result = FAILED;
US_DEBUGP("No reset during disconnect\n");
} else
result = us->transport_reset(us);
up(&(us->dev_semaphore));
/* lock access to the state and clear it */
scsi_lock(us_to_host(us));
us->sm_state = US_STATE_IDLE;
return result;
}
/* Report a driver-initiated bus reset to the SCSI layer.
* Calling this for a SCSI-initiated reset is unnecessary but harmless.
* The caller must not own the SCSI host lock. */
void usb_stor_report_bus_reset(struct us_data *us)
{
struct Scsi_Host *host = us_to_host(us);
scsi_lock(host);
scsi_report_bus_reset(host, 0);
scsi_unlock(host);
}
/* This is the common part of the device reset code.
*
* It's handy that every transport mechanism uses the control endpoint for
* resets.
*
* Basically, we send a reset with a 20-second timeout, so we don't get
* jammed attempting to do the reset.
*/
static int usb_stor_reset_common(struct us_data *us,
u8 request, u8 requesttype,
u16 value, u16 index, void *data, u16 size)
{
int result;
int result2;
int rc = FAILED;
/* Let the SCSI layer know we are doing a reset, set the
* RESETTING bit, and clear the ABORTING bit so that the reset
* may proceed.
*/
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
set_bit(US_FLIDX_RESETTING, &us->flags);
clear_bit(US_FLIDX_ABORTING, &us->flags);
scsi_unlock(us_to_host(us));
/* A 20-second timeout may seem rather long, but a LaCie
* StudioDrive USB2 device takes 16+ seconds to get going
* following a powerup or USB attach event.
*/
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
request, requesttype, value, index, data, size,
20*HZ);
if (result < 0) {
US_DEBUGP("Soft reset failed: %d\n", result);
goto Done;
}
/* Give the device some time to recover from the reset,
* but don't delay disconnect processing. */
wait_event_interruptible_timeout(us->delay_wait,
test_bit(US_FLIDX_DISCONNECTING, &us->flags),
HZ*6);
if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
US_DEBUGP("Reset interrupted by disconnect\n");
goto Done;
}
US_DEBUGP("Soft reset: clearing bulk-in endpoint halt\n");
result = usb_stor_clear_halt(us, us->recv_bulk_pipe);
US_DEBUGP("Soft reset: clearing bulk-out endpoint halt\n");
result2 = usb_stor_clear_halt(us, us->send_bulk_pipe);
/* return a result code based on the result of the control message */
if (result < 0 || result2 < 0) {
US_DEBUGP("Soft reset failed\n");
goto Done;
}
US_DEBUGP("Soft reset done\n");
rc = SUCCESS;
Done:
clear_bit(US_FLIDX_RESETTING, &us->flags);
return rc;
}
/* This is always called with scsi_lock(srb->host) held */
static int bus_reset(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
int result;
US_DEBUGP("%s called\n", __FUNCTION__);
if (us->sm_state != US_STATE_IDLE) {
printk(KERN_ERR USB_STORAGE "Error in %s: "
"invalid state %d\n", __FUNCTION__, us->sm_state);
return FAILED;
}
/* set the state and release the lock */
us->sm_state = US_STATE_RESETTING;
scsi_unlock(us_to_host(us));
/* The USB subsystem doesn't handle synchronisation between
* a device's several drivers. Therefore we reset only devices
* with just one interface, which we of course own. */
down(&(us->dev_semaphore));
if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
result = -EIO;
US_DEBUGP("No reset during disconnect\n");
} else if (us->pusb_dev->actconfig->desc.bNumInterfaces != 1) {
result = -EBUSY;
US_DEBUGP("Refusing to reset a multi-interface device\n");
} else {
/*
* The lock can be taken when khubd is executing scsi_scan()
* at the very tail of our ->probe routine.
* If a device fails there, it has to be replugged.
*/
result = usb_reset_device_trylock(us->pusb_dev);
US_DEBUGP("usb_reset_device returns %d\n", result);
}
up(&(us->dev_semaphore));
/* lock access to the state and clear it */
scsi_lock(us_to_host(us));
us->sm_state = US_STATE_IDLE;
/* We must return succes, or else the device is offlined forever */
if (result < 0) {
printk(KERN_NOTICE USB_STORAGE "Bus reset ended with %d\n",
result);
}
return SUCCESS;
}
/* This is always called with scsi_lock(srb->host) held */
static int command_abort(struct scsi_cmnd *srb )
{
struct us_data *us = host_to_us(srb->device->host);
US_DEBUGP("%s called\n", __FUNCTION__);
/* Is this command still active? */
if (us->srb != srb) {
US_DEBUGP ("-- nothing to abort\n");
return FAILED;
}
/* Normally the current state is RUNNING. If the control thread
* hasn't even started processing this command, the state will be
* IDLE. Anything else is a bug. */
if (us->sm_state != US_STATE_RUNNING
&& us->sm_state != US_STATE_IDLE) {
printk(KERN_ERR USB_STORAGE "Error in %s: "
"invalid state %d\n", __FUNCTION__, us->sm_state);
return FAILED;
}
/* Set state to ABORTING and set the ABORTING bit, but only if
* a device reset isn't already in progress (to avoid interfering
* with the reset). To prevent races with auto-reset, we must
* stop any ongoing USB transfers while still holding the host
* lock. */
us->sm_state = US_STATE_ABORTING;
if (!test_bit(US_FLIDX_RESETTING, &us->flags)) {
set_bit(US_FLIDX_ABORTING, &us->flags);
usb_stor_stop_transport(us);
}
scsi_unlock(us_to_host(us));
/* Wait for the aborted command to finish */
wait_for_completion(&us->notify);
/* Reacquire the lock and allow USB transfers to resume */
scsi_lock(us_to_host(us));
clear_bit(US_FLIDX_ABORTING, &us->flags);
return SUCCESS;
}
static void quiesce_and_remove_host(struct rts51x_chip *chip)
{
struct rts51x_usb *rts51x = chip->usb;
struct Scsi_Host *host = rts51x_to_host(chip);
if (rts51x->pusb_dev->state == USB_STATE_NOTATTACHED)
set_bit(FLIDX_DISCONNECTING, &rts51x->dflags);
#ifdef SCSI_SCAN_DELAY
set_bit(FLIDX_DONT_SCAN, &rts51x->dflags);
wake_up(&rts51x->delay_wait);
wait_for_completion(&rts51x->scanning_done);
#endif
scsi_remove_host(host);
scsi_lock(host);
set_bit(FLIDX_DISCONNECTING, &rts51x->dflags);
scsi_unlock(host);
#ifdef SCSI_SCAN_DELAY
wake_up(&rts51x->delay_wait);
#endif
}
/*
* usb_stor_invoke_transport()
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* pr_info("transport --- usb_stor_invoke_transport\n"); */
usb_stor_print_cmd(srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us); /* usb_stor_Bulk_transport; */
/* if the command gets aborted by the higher layers,
we need to short-circuit all other processing */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- command was aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
/* pr_info("-- transport indicates error, resetting\n"); */
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense */
need_auto_sense = 0;
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
/* pr_info("-- CB transport device requiring auto-sense\n"); */
need_auto_sense = 1;
}
if (result == USB_STOR_TRANSPORT_FAILED) {
/* pr_info("-- transport indicates command failure\n"); */
need_auto_sense = 1;
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
pr_info("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
/* we must do the protocol translation here */
if (us->subclass == USB_SC_RBC ||
us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB) {
srb->cmd_len = 6;
} else {
srb->cmd_len = 12;
}
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- auto-sense aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
/* pr_info("-- auto-sense failure\n"); */
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
if (result == USB_STOR_TRANSPORT_GOOD &&
(srb->sense_buffer[2] & 0xaf) == 0 &&
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16);
/* v02 | (SUGGEST_RETRY << 24); */
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
}
static int rtsx_control_thread(void *__dev)
{
struct rtsx_dev *dev = __dev;
struct rtsx_chip *chip = dev->chip;
struct Scsi_Host *host = rtsx_to_host(dev);
for (;;) {
if (wait_for_completion_interruptible(&dev->cmnd_ready))
break;
/* lock the device pointers */
mutex_lock(&(dev->dev_mutex));
/* if the device has disconnected, we are free to exit */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
dev_info(&dev->pci->dev, "-- rtsx-control exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
/* lock access to the state */
scsi_lock(host);
/* has the command aborted ? */
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
chip->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
/* reject the command if the direction indicator
* is UNKNOWN
*/
if (chip->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
dev_err(&dev->pci->dev, "UNKNOWN data direction\n");
chip->srb->result = DID_ERROR << 16;
}
/* reject if target != 0 or if LUN is higher than
* the maximum known LUN
*/
else if (chip->srb->device->id) {
dev_err(&dev->pci->dev, "Bad target number (%d:%d)\n",
chip->srb->device->id,
(u8)chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else if (chip->srb->device->lun > chip->max_lun) {
dev_err(&dev->pci->dev, "Bad LUN (%d:%d)\n",
chip->srb->device->id,
(u8)chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
/* we've got a command, let's do it! */
else {
scsi_show_command(chip);
rtsx_invoke_transport(chip->srb, chip);
}
/* lock access to the state */
scsi_lock(host);
/* did the command already complete because of a disconnect? */
if (!chip->srb)
; /* nothing to do */
/* indicate that the command is done */
else if (chip->srb->result != DID_ABORT << 16) {
chip->srb->scsi_done(chip->srb);
} else {
SkipForAbort:
dev_err(&dev->pci->dev, "scsi command aborted\n");
}
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
complete(&(dev->notify));
rtsx_set_stat(chip, RTSX_STAT_IDLE);
}
/* finished working on this command */
chip->srb = NULL;
scsi_unlock(host);
/* unlock the device pointers */
mutex_unlock(&dev->dev_mutex);
} /* for (;;) */
/* notify the exit routine that we're actually exiting now
*
* complete()/wait_for_completion() is similar to up()/down(),
* except that complete() is safe in the case where the structure
* is getting deleted in a parallel mode of execution (i.e. just
* after the down() -- that's necessary for the thread-shutdown
* case.
*
* complete_and_exit() goes even further than this -- it is safe in
* the case that the thread of the caller is going away (not just
* the structure) -- this is necessary for the module-remove case.
* This is important in preemption kernels, which transfer the flow
* of execution immediately upon a complete().
*/
complete_and_exit(&dev->control_exit, 0);
}
/* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us);
/* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
last_sector_hacks(us, srb);
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense
*
* I normally don't use a flag like this, but it's almost impossible
* to understand what's going on here if I don't.
*/
need_auto_sense = 0;
/*
* If we're running the CB transport, which is incapable
* of determining status on its own, we will auto-sense
* unless the operation involved a data-in transfer. Devices
* can signal most data-in errors by stalling the bulk-in pipe.
*/
if ((us->protocol == US_PR_CB || us->protocol == US_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
/*
* If we have a failure, we're going to do a REQUEST_SENSE
* automatically. Note that we differentiate between a command
* "failure" and an "error" in the transport mechanism.
*/
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
/*
* Determine if this device is SAT by seeing if the
* command executed successfully. Otherwise we'll have
* to wait for at least one CHECK_CONDITION to determine
* SANE_SENSE support
*/
if ((srb->cmnd[0] == ATA_16 || srb->cmnd[0] == ATA_12) &&
result == USB_STOR_TRANSPORT_GOOD &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(srb->cmnd[2] & 0x20)) {
US_DEBUGP("-- SAT supported, increasing auto-sense\n");
us->fflags |= US_FL_SANE_SENSE;
}
/*
* A short transfer on a command where we don't expect it
* is unusual, but it doesn't mean we need to auto-sense.
*/
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
int sense_size = US_SENSE_SIZE;
/* device supports and needs bigger sense buffer */
if (us->fflags & US_FL_SANE_SENSE)
sense_size = ~0;
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, sense_size);
/* FIXME: we must do the protocol translation here */
if (us->subclass == US_SC_RBC || us->subclass == US_SC_SCSI ||
us->subclass == US_SC_CYP_ATACB)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
/* we skip the reset if this happens to be a
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
/* If the sense data returned is larger than 18-bytes then we
* assume this device supports requesting more in the future.
* The response code must be 70h through 73h inclusive.
*/
if (srb->sense_buffer[7] > (US_SENSE_SIZE - 8) &&
!(us->fflags & US_FL_SANE_SENSE) &&
(srb->sense_buffer[0] & 0x7C) == 0x70) {
US_DEBUGP("-- SANE_SENSE support enabled\n");
us->fflags |= US_FL_SANE_SENSE;
/* Indicate to the user that we truncated their sense
* because we didn't know it supported larger sense.
*/
US_DEBUGP("-- Sense data truncated to %i from %i\n",
US_SENSE_SIZE,
srb->sense_buffer[7] + 8);
srb->sense_buffer[7] = (US_SENSE_SIZE - 8);
}
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
srb->sense_buffer[0],
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#endif
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
/* If things are really okay, then let's show that. Zero
* out the sense buffer so the higher layers won't realize
* we did an unsolicited auto-sense. */
if (result == USB_STOR_TRANSPORT_GOOD &&
/* Filemark 0, ignore EOM, ILI 0, no sense */
(srb->sense_buffer[2] & 0xaf) == 0 &&
/* No ASC or ASCQ */
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if ((srb->result == SAM_STAT_GOOD || srb->sense_buffer[2] == 0) &&
scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
srb->result = DID_ERROR << 16;
last_sector_hacks(us, srb);
return;
/* Error and abort processing: try to resynchronize with the device
* by issuing a port reset. If that fails, try a class-specific
* device reset. */
Handle_Errors:
/* Set the RESETTING bit, and clear the ABORTING bit so that
* the reset may proceed. */
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
/* We must release the device lock because the pre_reset routine
* will want to acquire it. */
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
last_sector_hacks(us, srb);
}
static int rts51x_control_thread(void *__chip)
{
struct rts51x_chip *chip = (struct rts51x_chip *)__chip;
struct Scsi_Host *host = rts51x_to_host(chip);
for (;;) {
if (wait_for_completion_interruptible(&chip->usb->cmnd_ready))
break;
if (test_bit(FLIDX_DISCONNECTING, &chip->usb->dflags)) {
RTS51X_DEBUGP("-- exiting from rts51x-control\n");
break;
}
mutex_lock(&(chip->usb->dev_mutex));
scsi_lock(host);
if (chip->srb == NULL) {
scsi_unlock(host);
mutex_unlock(&chip->usb->dev_mutex);
RTS51X_DEBUGP("-- exiting from control thread\n");
break;
}
if (test_bit(FLIDX_TIMED_OUT, &chip->usb->dflags)) {
chip->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
if (chip->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
RTS51X_DEBUGP("UNKNOWN data direction\n");
chip->srb->result = DID_ERROR << 16;
}
else if (chip->srb->device->id) {
RTS51X_DEBUGP("Bad target number (%d:%d)\n",
chip->srb->device->id,
chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else if (chip->srb->device->lun > chip->max_lun) {
RTS51X_DEBUGP("Bad LUN (%d:%d)\n",
chip->srb->device->id,
chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else {
RTS51X_DEBUG(scsi_show_command(chip->srb));
rts51x_invoke_transport(chip->srb, chip);
}
scsi_lock(host);
if (chip->srb->result != DID_ABORT << 16)
chip->srb->scsi_done(chip->srb);
else
SkipForAbort :
RTS51X_DEBUGP("scsi command aborted\n");
if (test_bit(FLIDX_TIMED_OUT, &chip->usb->dflags)) {
complete(&(chip->usb->notify));
clear_bit(FLIDX_ABORTING, &chip->usb->dflags);
clear_bit(FLIDX_TIMED_OUT, &chip->usb->dflags);
}
chip->srb = NULL;
scsi_unlock(host);
mutex_unlock(&chip->usb->dev_mutex);
}
complete(&chip->usb->control_exit);
return 0;
}
static int usb_stor_control_thread(void * __us)
{
struct us_data *us = (struct us_data *)__us;
struct Scsi_Host *host = us_to_host(us);
//---------------------------
pr_info("7 usb stor control thread\n");
for(;;) {
//若有u盘拔插或者有命令才会awake，否则一直就在这睡觉觉
if (wait_for_completion_interruptible(&us->cmnd_ready))
break;
//从此处wake
/* */
mutex_lock(&(us->dev_mutex));
/*每当需要写us->srb时候就需要锁之 */
scsi_lock(host);
if (us->srb == NULL) {
scsi_unlock(host);
mutex_unlock(&us->dev_mutex);
US_DEBUGP("-- exiting\n");
break;
}
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
us->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
US_DEBUGP("UNKNOWN data direction\n");
us->srb->result = DID_ERROR << 16;
}
else if (us->srb->device->id &&
!(us->fflags & US_FL_SCM_MULT_TARG)) {
US_DEBUGP("Bad target number (%d:%d)\n",
us->srb->device->id, us->srb->device->lun);
us->srb->result = DID_BAD_TARGET << 16;
}
else if (us->srb->device->lun > us->max_lun) {
US_DEBUGP("Bad LUN (%d:%d)\n",
us->srb->device->id, us->srb->device->lun);
us->srb->result = DID_BAD_TARGET << 16;
}
else if ((us->srb->cmnd[0] == INQUIRY) &&
(us->fflags & US_FL_FIX_INQUIRY)) {
unsigned char data_ptr[36] = {
0x00, 0x80, 0x02, 0x02,
0x1F, 0x00, 0x00, 0x00};
US_DEBUGP("Faking INQUIRY command\n");
fill_inquiry_response(us, data_ptr, 36);
us->srb->result = SAM_STAT_GOOD;
}
else {
US_DEBUG(usb_stor_show_command(us->srb));
us->proto_handler(us->srb, us);
usb_mark_last_busy(us->pusb_dev);
}
scsi_lock(host);
if (us->srb->result != DID_ABORT << 16) {
US_DEBUGP("scsi cmd done, result=0x%x\n",
us->srb->result);
us->srb->scsi_done(us->srb);
} else {
SkipForAbort:
US_DEBUGP("scsi command aborted\n");
}
/* */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
complete(&(us->notify));
clear_bit(US_FLIDX_ABORTING, &us->dflags);
clear_bit(US_FLIDX_TIMED_OUT, &us->dflags);
}
us->srb = NULL;
scsi_unlock(host);
/
mutex_unlock(&us->dev_mutex);
}
static int rtsx_control_thread(void * __dev)
{
struct rtsx_dev *dev = (struct rtsx_dev *)__dev;
struct rtsx_chip *chip = dev->chip;
struct Scsi_Host *host = rtsx_to_host(dev);
current->flags |= PF_NOFREEZE;
for(;;) {
if(down_interruptible(&dev->sema))
break;
mutex_lock(&(dev->dev_mutex));
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "-- rtsx-control exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
scsi_lock(host);
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
chip->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
/* reject the command if the direction indicator
* is UNKNOWN
*/
if (chip->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
printk(KERN_ERR "UNKNOWN data direction\n");
chip->srb->result = DID_ERROR << 16;
}
/* reject if target != 0 or if LUN is higher than
* the maximum known LUN
*/
else if (chip->srb->device->id) {
printk(KERN_ERR "Bad target number (%d:%d)\n",
chip->srb->device->id, chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else if (chip->srb->device->lun > chip->max_lun) {
printk(KERN_ERR "Bad LUN (%d:%d)\n",
chip->srb->device->id, chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else {
RTSX_DEBUG(scsi_show_command(chip->srb));
rtsx_invoke_transport(chip->srb, chip);
}
scsi_lock(host);
if (!chip->srb)
;
else if (chip->srb->result != DID_ABORT << 16) {
chip->srb->scsi_done(chip->srb);
} else {
SkipForAbort:
printk(KERN_ERR "scsi command aborted\n");
}
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
complete(&(dev->notify));
rtsx_set_stat(chip, RTSX_STAT_IDLE);
}
chip->srb = NULL;
scsi_unlock(host);
mutex_unlock(&dev->dev_mutex);
}
scsi_host_put(host);
/* notify the exit routine that we're actually exiting now
*
* complete()/wait_for_completion() is similar to up()/down(),
* except that complete() is safe in the case where the structure
* is getting deleted in a parallel mode of execution (i.e. just
* after the down() -- that's necessary for the thread-shutdown
* case.
*
* complete_and_exit() goes even further than this -- it is safe in
* the case that the thread of the caller is going away (not just
* the structure) -- this is necessary for the module-remove case.
* This is important in preemption kernels, which transfer the flow
* of execution immediately upon a complete().
*/
complete_and_exit(&threads_gone, 0);
}
/*
* ENE_stor_invoke_transport()
*/
void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int result = 0;
/* pr_info("transport --- ENE_stor_invoke_transport\n"); */
usb_stor_print_cmd(srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
if (!(us->MS_Status.Ready || us->SM_Status.Ready))
result = ENE_InitMedia(us);
if (us->Power_IsResum == true) {
result = ENE_InitMedia(us);
us->Power_IsResum = false;
}
if (us->MS_Status.Ready)
result = MS_SCSIIrp(us, srb);
if (us->SM_Status.Ready)
result = SM_SCSIIrp(us, srb);
/* if the command gets aborted by the higher layers,
we need to short-circuit all other processing */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- command was aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
/* pr_info("-- transport indicates error, resetting\n"); */
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
if (result == USB_STOR_TRANSPORT_FAILED) {
/* pr_info("-- transport indicates command failure\n"); */
/* need_auto_sense = 1; */
BuildSenseBuffer(srb, us->SrbStatus);
srb->result = SAM_STAT_CHECK_CONDITION;
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16);
/* v02 | (SUGGEST_RETRY << 24); */
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
}
/* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* send the command to the transport layer */
srb->resid = 0;
result = us->transport(srb, us);
/* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
_VMKLNX_USB_STOR_MSG("-- command was aborted\n", srb);
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
#if defined(__VMKLNX__)
if (unlikely(scsi_dump_active(srb))) {
/* can't do much in panic */
if (result != USB_STOR_TRANSPORT_GOOD) {
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
}
#endif
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
_VMKLNX_USB_STOR_WARN("-- transport indicates error, resetting\n", srb);
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
#if defined(__VMKLNX__)
BUG_ON(srb->sense_buffer[0] == 0);
#endif
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense
*
* I normally don't use a flag like this, but it's almost impossible
* to understand what's going on here if I don't.
*/
need_auto_sense = 0;
/*
* If we're running the CB transport, which is incapable
* of determining status on its own, we will auto-sense
* unless the operation involved a data-in transfer. Devices
* can signal most data-in errors by stalling the bulk-in pipe.
*/
if ((us->protocol == US_PR_CB || us->protocol == US_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
_VMKLNX_USB_STOR_MSG("-- CB transport device requiring auto-sense\n", srb);
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
/*
* If we have a failure, we're going to do a REQUEST_SENSE
* automatically. Note that we differentiate between a command
* "failure" and an "error" in the transport mechanism.
*/
if (result == USB_STOR_TRANSPORT_FAILED) {
_VMKLNX_USB_STOR_MSG("-- transport indicates command failure\n", srb);
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
/*
* A short transfer on a command where we don't expect it
* is unusual, but it doesn't mean we need to auto-sense.
*/
if ((srb->resid > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
_VMKLNX_USB_STOR_MSG("-- unexpectedly short transfer\n", srb);
US_DEBUGP("-- unexpectedly short transfer\n");
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
#if defined(__VMKLNX__)
/* use us->senebuf to get sense data; srb->sense_buffer might be above 4G,
* yet device's dma_mask is set to 32-bit */
usb_stor_prep_cmd(srb, &ses, us->sensebuf);
#else
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
#endif
/* FIXME: we must do the protocol translation here */
if (us->subclass == US_SC_RBC || us->subclass == US_SC_SCSI)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
/* issue the auto-sense command */
srb->resid = 0;
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
#if defined(__VMKLNX__)
usb_stor_restore_cmnd(srb, &ses);
#else
scsi_eh_restore_cmnd(srb, &ses);
#endif
if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
/* we skip the reset if this happens to be a
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
srb->result = DID_ERROR << 16;
if (!(us->flags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
srb->sense_buffer[0],
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#endif
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
#if defined(__VMKLNX__)
if (unlikely(srb->sense_buffer[0] == 0))
_VMKLNX_USB_STOR_MSG("srb->sense_buffer[0] unexpectedly 0 for srb %p\n", srb, srb);
BUG_ON(srb->sense_buffer[0] == 0);
#endif
/* If things are really okay, then let's show that. Zero
* out the sense buffer so the higher layers won't realize
* we did an unsolicited auto-sense. */
if (result == USB_STOR_TRANSPORT_GOOD &&
/* Filemark 0, ignore EOM, ILI 0, no sense */
(srb->sense_buffer[2] & 0xaf) == 0 &&
/* No ASC or ASCQ */
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD &&
srb->request_bufflen - srb->resid < srb->underflow)
srb->result = (DID_ERROR << 16) | (SUGGEST_RETRY << 24);
return;
/* Error and abort processing: try to resynchronize with the device
* by issuing a port reset. If that fails, try a class-specific
* device reset. */
Handle_Errors:
/* Set the RESETTING bit, and clear the ABORTING bit so that
* the reset may proceed. */
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->flags);
clear_bit(US_FLIDX_ABORTING, &us->flags);
scsi_unlock(us_to_host(us));
/* We must release the device lock because the pre_reset routine
* will want to acquire it. */
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->flags);
}
/* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us);
/* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
last_sector_hacks(us, srb);
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense
*
* I normally don't use a flag like this, but it's almost impossible
* to understand what's going on here if I don't.
*/
need_auto_sense = 0;
/*
* If we're running the CB transport, which is incapable
* of determining status on its own, we will auto-sense
* unless the operation involved a data-in transfer. Devices
* can signal most data-in errors by stalling the bulk-in pipe.
*/
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
/*
* If we have a failure, we're going to do a REQUEST_SENSE
* automatically. Note that we differentiate between a command
* "failure" and an "error" in the transport mechanism.
*/
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
/*
* Determine if this device is SAT by seeing if the
* command executed successfully. Otherwise we'll have
* to wait for at least one CHECK_CONDITION to determine
* SANE_SENSE support
*/
if (unlikely((srb->cmnd[0] == ATA_16 || srb->cmnd[0] == ATA_12) &&
result == USB_STOR_TRANSPORT_GOOD &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
!(srb->cmnd[2] & 0x20))) {
US_DEBUGP("-- SAT supported, increasing auto-sense\n");
us->fflags |= US_FL_SANE_SENSE;
}
/*
* A short transfer on a command where we don't expect it
* is unusual, but it doesn't mean we need to auto-sense.
*/
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
int sense_size = US_SENSE_SIZE;
struct scsi_sense_hdr sshdr;
const u8 *scdd;
u8 fm_ili;
/* device supports and needs bigger sense buffer */
if (us->fflags & US_FL_SANE_SENSE)
sense_size = ~0;
Retry_Sense:
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, sense_size);
/* FIXME: we must do the protocol translation here */
if (us->subclass == USB_SC_RBC || us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
/* If SANE_SENSE caused this problem, disable it */
if (sense_size != US_SENSE_SIZE) {
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
}
goto Handle_Errors;
}
/* Some devices claim to support larger sense but fail when
* trying to request it. When a transport failure happens
* using US_FS_SANE_SENSE, we always retry with a standard
* (small) sense request. This fixes some USB GSM modems
*/
if (temp_result == USB_STOR_TRANSPORT_FAILED &&
sense_size != US_SENSE_SIZE) {
US_DEBUGP("-- auto-sense failure, retry small sense\n");
sense_size = US_SENSE_SIZE;
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
goto Retry_Sense;
}
/* Other failures */
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
/* we skip the reset if this happens to be a
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
/* If the sense data returned is larger than 18-bytes then we
* assume this device supports requesting more in the future.
* The response code must be 70h through 73h inclusive.
*/
if (srb->sense_buffer[7] > (US_SENSE_SIZE - 8) &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
(srb->sense_buffer[0] & 0x7C) == 0x70) {
US_DEBUGP("-- SANE_SENSE support enabled\n");
us->fflags |= US_FL_SANE_SENSE;
/* Indicate to the user that we truncated their sense
* because we didn't know it supported larger sense.
*/
US_DEBUGP("-- Sense data truncated to %i from %i\n",
US_SENSE_SIZE,
srb->sense_buffer[7] + 8);
srb->sense_buffer[7] = (US_SENSE_SIZE - 8);
}
scsi_normalize_sense(srb->sense_buffer, SCSI_SENSE_BUFFERSIZE,
&sshdr);
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
sshdr.response_code, sshdr.sense_key,
sshdr.asc, sshdr.ascq);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(sshdr.sense_key, sshdr.asc, sshdr.ascq);
#endif
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
scdd = scsi_sense_desc_find(srb->sense_buffer,
SCSI_SENSE_BUFFERSIZE, 4);
fm_ili = (scdd ? scdd[3] : srb->sense_buffer[2]) & 0xA0;
/* We often get empty sense data. This could indicate that
* everything worked or that there was an unspecified
* problem. We have to decide which.
*/
if (sshdr.sense_key == 0 && sshdr.asc == 0 && sshdr.ascq == 0 &&
fm_ili == 0) {
/* If things are really okay, then let's show that.
* Zero out the sense buffer so the higher layers
* won't realize we did an unsolicited auto-sense.
*/
if (result == USB_STOR_TRANSPORT_GOOD) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
/* If there was a problem, report an unspecified
* hardware error to prevent the higher layers from
* entering an infinite retry loop.
*/
} else {
srb->result = DID_ERROR << 16;
if ((sshdr.response_code & 0x72) == 0x72)
srb->sense_buffer[1] = HARDWARE_ERROR;
else
srb->sense_buffer[2] = HARDWARE_ERROR;
}
}
}
/*
* Some devices don't work or return incorrect data the first
* time they get a READ(10) command, or for the first READ(10)
* after a media change. If the INITIAL_READ10 flag is set,
* keep track of whether READ(10) commands succeed. If the
* previous one succeeded and this one failed, set the REDO_READ10
* flag to force a retry.
*/
if (unlikely((us->fflags & US_FL_INITIAL_READ10) &&
srb->cmnd[0] == READ_10)) {
if (srb->result == SAM_STAT_GOOD) {
set_bit(US_FLIDX_READ10_WORKED, &us->dflags);
} else if (test_bit(US_FLIDX_READ10_WORKED, &us->dflags)) {
clear_bit(US_FLIDX_READ10_WORKED, &us->dflags);
set_bit(US_FLIDX_REDO_READ10, &us->dflags);
}
/*
* Next, if the REDO_READ10 flag is set, return a result
* code that will cause the SCSI core to retry the READ(10)
* command immediately.
*/
if (test_bit(US_FLIDX_REDO_READ10, &us->dflags)) {
clear_bit(US_FLIDX_REDO_READ10, &us->dflags);
srb->result = DID_IMM_RETRY << 16;
srb->sense_buffer[0] = 0;
}
}
/* Did we transfer less than the minimum amount required? */
if ((srb->result == SAM_STAT_GOOD || srb->sense_buffer[2] == 0) &&
scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
srb->result = DID_ERROR << 16;
last_sector_hacks(us, srb);
return;
/* Error and abort processing: try to resynchronize with the device
* by issuing a port reset. If that fails, try a class-specific
* device reset. */
Handle_Errors:
/* Set the RESETTING bit, and clear the ABORTING bit so that
* the reset may proceed. */
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
/* We must release the device lock because the pre_reset routine
* will want to acquire it. */
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
last_sector_hacks(us, srb);
}
/* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* send the command to the transport layer */
srb->resid = 0;
result = us->transport(srb, us);
/* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense
*
* I normally don't use a flag like this, but it's almost impossible
* to understand what's going on here if I don't.
*/
need_auto_sense = 0;
/*
* If we're running the CB transport, which is incapable
* of determining status on its own, we will auto-sense
* unless the operation involved a data-in transfer. Devices
* can signal most data-in errors by stalling the bulk-in pipe.
*/
if ((us->protocol == US_PR_CB || us->protocol == US_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
/*
* If we have a failure, we're going to do a REQUEST_SENSE
* automatically. Note that we differentiate between a command
* "failure" and an "error" in the transport mechanism.
*/
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
/*
* A short transfer on a command where we don't expect it
* is unusual, but it doesn't mean we need to auto-sense.
*/
if ((srb->resid > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
void* old_request_buffer;
unsigned short old_sg;
unsigned old_request_bufflen;
unsigned char old_sc_data_direction;
unsigned char old_cmd_len;
unsigned char old_cmnd[MAX_COMMAND_SIZE];
int old_resid;
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
/* save the old command */
memcpy(old_cmnd, srb->cmnd, MAX_COMMAND_SIZE);
old_cmd_len = srb->cmd_len;
/* set the command and the LUN */
memset(srb->cmnd, 0, MAX_COMMAND_SIZE);
srb->cmnd[0] = REQUEST_SENSE;
srb->cmnd[1] = old_cmnd[1] & 0xE0;
srb->cmnd[4] = 18;
/* FIXME: we must do the protocol translation here */
if (us->subclass == US_SC_RBC || us->subclass == US_SC_SCSI)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
/* set the transfer direction */
old_sc_data_direction = srb->sc_data_direction;
srb->sc_data_direction = DMA_FROM_DEVICE;
/* use the new buffer we have */
old_request_buffer = srb->request_buffer;
srb->request_buffer = us->sensebuf;
/* set the buffer length for transfer */
old_request_bufflen = srb->request_bufflen;
srb->request_bufflen = US_SENSE_SIZE;
/* set up for no scatter-gather use */
old_sg = srb->use_sg;
srb->use_sg = 0;
/* issue the auto-sense command */
old_resid = srb->resid;
srb->resid = 0;
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
memcpy(srb->sense_buffer, us->sensebuf, US_SENSE_SIZE);
srb->resid = old_resid;
srb->request_buffer = old_request_buffer;
srb->request_bufflen = old_request_bufflen;
srb->use_sg = old_sg;
srb->sc_data_direction = old_sc_data_direction;
srb->cmd_len = old_cmd_len;
memcpy(srb->cmnd, old_cmnd, MAX_COMMAND_SIZE);
if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
/* we skip the reset if this happens to be a
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
srb->result = DID_ERROR << 16;
if (!(us->flags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
srb->sense_buffer[0],
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#endif
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
/* If things are really okay, then let's show that. Zero
* out the sense buffer so the higher layers won't realize
* we did an unsolicited auto-sense. */
if (result == USB_STOR_TRANSPORT_GOOD &&
/* Filemark 0, ignore EOM, ILI 0, no sense */
(srb->sense_buffer[2] & 0xaf) == 0 &&
/* No ASC or ASCQ */
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD &&
srb->request_bufflen - srb->resid < srb->underflow)
srb->result = (DID_ERROR << 16) | (SUGGEST_RETRY << 24);
return;
/* Error and abort processing: try to resynchronize with the device
* by issuing a port reset. If that fails, try a class-specific
* device reset. */
Handle_Errors:
/* Let the SCSI layer know we are doing a reset, set the
* RESETTING bit, and clear the ABORTING bit so that the reset
* may proceed. */
scsi_lock(us_to_host(us));
usb_stor_report_bus_reset(us);
set_bit(US_FLIDX_RESETTING, &us->flags);
clear_bit(US_FLIDX_ABORTING, &us->flags);
scsi_unlock(us_to_host(us));
result = usb_stor_port_reset(us);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->flags);
}
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
scsi_set_resid(srb, 0);
result = us->transport(srb, us);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
last_sector_hacks(us, srb);
return;
}
srb->result = SAM_STAT_GOOD;
need_auto_sense = 0;
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
if (unlikely((srb->cmnd[0] == ATA_16 || srb->cmnd[0] == ATA_12) &&
result == USB_STOR_TRANSPORT_GOOD &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
!(srb->cmnd[2] & 0x20))) {
US_DEBUGP("-- SAT supported, increasing auto-sense\n");
us->fflags |= US_FL_SANE_SENSE;
}
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
int sense_size = US_SENSE_SIZE;
struct scsi_sense_hdr sshdr;
const u8 *scdd;
u8 fm_ili;
if (us->fflags & US_FL_SANE_SENSE)
sense_size = ~0;
Retry_Sense:
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, sense_size);
if (us->subclass == USB_SC_RBC || us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
if (sense_size != US_SENSE_SIZE) {
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
}
goto Handle_Errors;
}
if (temp_result == USB_STOR_TRANSPORT_FAILED &&
sense_size != US_SENSE_SIZE) {
US_DEBUGP("-- auto-sense failure, retry small sense\n");
sense_size = US_SENSE_SIZE;
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
goto Retry_Sense;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
if (srb->sense_buffer[7] > (US_SENSE_SIZE - 8) &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
(srb->sense_buffer[0] & 0x7C) == 0x70) {
US_DEBUGP("-- SANE_SENSE support enabled\n");
us->fflags |= US_FL_SANE_SENSE;
US_DEBUGP("-- Sense data truncated to %i from %i\n",
US_SENSE_SIZE,
srb->sense_buffer[7] + 8);
srb->sense_buffer[7] = (US_SENSE_SIZE - 8);
}
scsi_normalize_sense(srb->sense_buffer, SCSI_SENSE_BUFFERSIZE,
&sshdr);
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
sshdr.response_code, sshdr.sense_key,
sshdr.asc, sshdr.ascq);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(sshdr.sense_key, sshdr.asc, sshdr.ascq);
#endif
srb->result = SAM_STAT_CHECK_CONDITION;
scdd = scsi_sense_desc_find(srb->sense_buffer,
SCSI_SENSE_BUFFERSIZE, 4);
fm_ili = (scdd ? scdd[3] : srb->sense_buffer[2]) & 0xA0;
if (sshdr.sense_key == 0 && sshdr.asc == 0 && sshdr.ascq == 0 &&
fm_ili == 0) {
if (result == USB_STOR_TRANSPORT_GOOD) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
} else {
srb->result = DID_ERROR << 16;
if ((sshdr.response_code & 0x72) == 0x72)
srb->sense_buffer[1] = HARDWARE_ERROR;
else
srb->sense_buffer[2] = HARDWARE_ERROR;
}
}
}
if (unlikely((us->fflags & US_FL_INITIAL_READ10) &&
srb->cmnd[0] == READ_10)) {
if (srb->result == SAM_STAT_GOOD) {
set_bit(US_FLIDX_READ10_WORKED, &us->dflags);
} else if (test_bit(US_FLIDX_READ10_WORKED, &us->dflags)) {
clear_bit(US_FLIDX_READ10_WORKED, &us->dflags);
set_bit(US_FLIDX_REDO_READ10, &us->dflags);
}
if (test_bit(US_FLIDX_REDO_READ10, &us->dflags)) {
clear_bit(US_FLIDX_REDO_READ10, &us->dflags);
srb->result = DID_IMM_RETRY << 16;
srb->sense_buffer[0] = 0;
}
}
if ((srb->result == SAM_STAT_GOOD || srb->sense_buffer[2] == 0) &&
scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
srb->result = DID_ERROR << 16;
last_sector_hacks(us, srb);
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
last_sector_hacks(us, srb);
}
//仔细研读
static int usb_stor_control_thread(void * __us)
{
struct us_data *us = (struct us_data *)__us;
struct Scsi_Host *host = us_to_host(us);
//---------------------------
pr_info("7 usb stor control thread\n");
for(;;) {
US_DEBUGP("*** thread sleeping.\n");
if (wait_for_completion_interruptible(&us->cmnd_ready))
break;
US_DEBUGP("*** thread awakened.\n");
/* lock the device pointers */
mutex_lock(&(us->dev_mutex));
/* lock access to the state */
scsi_lock(host);
/* When we are called with no command pending, we're done */
if (us->srb == NULL) {
scsi_unlock(host);
mutex_unlock(&us->dev_mutex);
US_DEBUGP("-- exiting\n");
break;
}
/* has the command timed out *already* ? */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
us->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
/* reject the command if the direction indicator
* is UNKNOWN
*/
if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
US_DEBUGP("UNKNOWN data direction\n");
us->srb->result = DID_ERROR << 16;
}
/* reject if target != 0 or if LUN is higher than
* the maximum known LUN
*/
else if (us->srb->device->id &&
!(us->fflags & US_FL_SCM_MULT_TARG)) {
US_DEBUGP("Bad target number (%d:%d)\n",
us->srb->device->id, us->srb->device->lun);
us->srb->result = DID_BAD_TARGET << 16;
}
else if (us->srb->device->lun > us->max_lun) {
US_DEBUGP("Bad LUN (%d:%d)\n",
us->srb->device->id, us->srb->device->lun);
us->srb->result = DID_BAD_TARGET << 16;
}
/* Handle those devices which need us to fake
* their inquiry data */
else if ((us->srb->cmnd[0] == INQUIRY) &&
(us->fflags & US_FL_FIX_INQUIRY)) {
unsigned char data_ptr[36] = {
0x00, 0x80, 0x02, 0x02,
0x1F, 0x00, 0x00, 0x00};
US_DEBUGP("Faking INQUIRY command\n");
fill_inquiry_response(us, data_ptr, 36);
us->srb->result = SAM_STAT_GOOD;
}
/* we've got a command, let's do it! */
else {
US_DEBUG(usb_stor_show_command(us->srb));
us->proto_handler(us->srb, us);
usb_mark_last_busy(us->pusb_dev);
}
/* lock access to the state */
scsi_lock(host);
/* indicate that the command is done */
if (us->srb->result != DID_ABORT << 16) {
US_DEBUGP("scsi cmd done, result=0x%x\n",
us->srb->result);
us->srb->scsi_done(us->srb);
} else {
SkipForAbort:
US_DEBUGP("scsi command aborted\n");
}
/* If an abort request was received we need to signal that
* the abort has finished. The proper test for this is
* the TIMED_OUT flag, not srb->result == DID_ABORT, because
* the timeout might have occurred after the command had
* already completed with a different result code. */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
complete(&(us->notify));
/* Allow USB transfers to resume */
clear_bit(US_FLIDX_ABORTING, &us->dflags);
clear_bit(US_FLIDX_TIMED_OUT, &us->dflags);
}
/* finished working on this command */
us->srb = NULL;
scsi_unlock(host);
/* unlock the device pointers */
mutex_unlock(&us->dev_mutex);
} /* for (;;) */
/* Wait until we are told to stop */
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (kthread_should_stop())
break;
schedule();
}
__set_current_state(TASK_RUNNING);
return 0;
}
