static ssize_t tpm_read(struct file *file, char __user *buf,
size_t size, loff_t *off)
{
struct file_priv *priv = file->private_data;
ssize_t ret_size;
int rc;
del_singleshot_timer_sync(&priv->user_read_timer);
flush_work(&priv->work);
ret_size = atomic_read(&priv->data_pending);
if (ret_size > 0) { /* relay data */
ssize_t orig_ret_size = ret_size;
if (size < ret_size)
ret_size = size;
mutex_lock(&priv->buffer_mutex);
rc = copy_to_user(buf, priv->data_buffer, ret_size);
memset(priv->data_buffer, 0, orig_ret_size);
if (rc)
ret_size = -EFAULT;
mutex_unlock(&priv->buffer_mutex);
}
atomic_set(&priv->data_pending, 0);
return ret_size;
}
/*
* Called on file close
*/
void tpm_common_release(struct file *file, struct file_priv *priv)
{
flush_work(&priv->async_work);
del_singleshot_timer_sync(&priv->user_read_timer);
flush_work(&priv->timeout_work);
file->private_data = NULL;
priv->response_length = 0;
}
/*
* Called on file close
*/
static int tpm_release(struct inode *inode, struct file *file)
{
struct file_priv *priv = file->private_data;
del_singleshot_timer_sync(&priv->user_read_timer);
flush_work(&priv->work);
file->private_data = NULL;
atomic_set(&priv->data_pending, 0);
clear_bit(0, &priv->chip->is_open);
kfree(priv);
return 0;
}
/*
* caller should make sure no race with other threads
*/
static
void ctx_clear_timer_kr(struct ptlrpc_cli_ctx *ctx)
{
struct gss_cli_ctx_keyring *gctx_kr = ctx2gctx_keyring(ctx);
struct timer_list *timer = gctx_kr->gck_timer;
if (timer == NULL)
return;
CDEBUG(D_SEC, "ctx %p, key %p\n", ctx, gctx_kr->gck_key);
gctx_kr->gck_timer = NULL;
del_singleshot_timer_sync(timer);
OBD_FREE_PTR(timer);
}
/*
* See if the other side has responded to a partition deactivate request
* from us. Though we requested the remote partition to deactivate with regard
* to us, we really only need to wait for the other side to disengage from us.
*/
int
xpc_partition_disengaged(struct xpc_partition *part)
{
short partid = XPC_PARTID(part);
int disengaged;
disengaged = !xpc_partition_engaged(partid);
if (part->disengage_timeout) {
if (!disengaged) {
if (time_is_after_jiffies(part->disengage_timeout)) {
/* timelimit hasn't been reached yet */
return 0;
}
/*
* Other side hasn't responded to our deactivate
* request in a timely fashion, so assume it's dead.
*/
dev_info(xpc_part, "deactivate request to remote "
"partition %d timed out\n", partid);
xpc_disengage_timedout = 1;
xpc_assume_partition_disengaged(partid);
disengaged = 1;
}
part->disengage_timeout = 0;
/* cancel the timer function, provided it's not us */
if (!in_interrupt())
del_singleshot_timer_sync(&part->disengage_timer);
DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING &&
part->act_state != XPC_P_AS_INACTIVE);
if (part->act_state != XPC_P_AS_INACTIVE)
xpc_wakeup_channel_mgr(part);
xpc_cancel_partition_deactivation_request(part);
}
return disengaged;
}
ssize_t tpm_common_read(struct file *file, char __user *buf,
size_t size, loff_t *off)
{
struct file_priv *priv = file->private_data;
ssize_t ret_size = 0;
int rc;
mutex_lock(&priv->buffer_mutex);
if (priv->response_length) {
priv->response_read = true;
ret_size = min_t(ssize_t, size, priv->response_length);
if (!ret_size) {
priv->response_length = 0;
goto out;
}
rc = copy_to_user(buf, priv->data_buffer + *off, ret_size);
if (rc) {
memset(priv->data_buffer, 0, TPM_BUFSIZE);
priv->response_length = 0;
ret_size = -EFAULT;
} else {
memset(priv->data_buffer + *off, 0, ret_size);
priv->response_length -= ret_size;
*off += ret_size;
}
}
out:
if (!priv->response_length) {
*off = 0;
del_singleshot_timer_sync(&priv->user_read_timer);
flush_work(&priv->timeout_work);
}
mutex_unlock(&priv->buffer_mutex);
return ret_size;
}
static void prism2sta_disconnect_usb(struct usb_interface *interface)
{
wlandevice_t *wlandev;
wlandev = (wlandevice_t *)usb_get_intfdata(interface);
if (wlandev != NULL) {
LIST_HEAD(cleanlist);
hfa384x_usbctlx_t *ctlx, *temp;
unsigned long flags;
hfa384x_t *hw = wlandev->priv;
if (!hw)
goto exit;
spin_lock_irqsave(&hw->ctlxq.lock, flags);
p80211netdev_hwremoved(wlandev);
list_splice_init(&hw->ctlxq.reapable, &cleanlist);
list_splice_init(&hw->ctlxq.completing, &cleanlist);
list_splice_init(&hw->ctlxq.pending, &cleanlist);
list_splice_init(&hw->ctlxq.active, &cleanlist);
spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
/* There's no hardware to shutdown, but the driver
* might have some tasks or tasklets that must be
* stopped before we can tear everything down.
*/
prism2sta_ifstate(wlandev, P80211ENUM_ifstate_disable);
del_singleshot_timer_sync(&hw->throttle);
del_singleshot_timer_sync(&hw->reqtimer);
del_singleshot_timer_sync(&hw->resptimer);
/* Unlink all the URBs. This "removes the wheels"
* from the entire CTLX handling mechanism.
*/
usb_kill_urb(&hw->rx_urb);
usb_kill_urb(&hw->tx_urb);
usb_kill_urb(&hw->ctlx_urb);
tasklet_kill(&hw->completion_bh);
tasklet_kill(&hw->reaper_bh);
cancel_work_sync(&hw->link_bh);
cancel_work_sync(&hw->commsqual_bh);
/* Now we complete any outstanding commands
* and tell everyone who is waiting for their
* responses that we have shut down.
*/
list_for_each_entry(ctlx, &cleanlist, list)
complete(&ctlx->done);
/* Give any outstanding synchronous commands
* a chance to complete. All they need to do
* is "wake up", so that's easy.
* (I'd like a better way to do this, really.)
*/
msleep(100);
/* Now delete the CTLXs, because no-one else can now. */
list_for_each_entry_safe(ctlx, temp, &cleanlist, list)
kfree(ctlx);
/* Unhook the wlandev */
unregister_wlandev(wlandev);
wlan_unsetup(wlandev);
usb_put_dev(hw->usb);
hfa384x_destroy(hw);
kfree(hw);
kfree(wlandev);
}
exit:
usb_set_intfdata(interface, NULL);
}
