/* 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;
}
/* This is always called with scsi_lock(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;
}
/* 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). To prevent races with auto-reset, we must
* stop any ongoing USB transfers while still holding the host
* 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);
}
/* Wait for the aborted command to finish */
wait_for_completion(&us->notify);
/* Reacquire the lock and allow USB transfers to resume */
clear_bit(US_FLIDX_ABORTING, &us->flags);
clear_bit(US_FLIDX_TIMED_OUT, &us->flags);
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;
}
