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NFC: Fix missing mutex unlock in pn533_send_cmd_frame_async 

If command allocation failed cmd_lock was not released and deadlock
would occur.

Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
hifive-unleashed-5.1
Szymon Janc 2012-09-27 09:16:54 +02:00 committed by Samuel Ortiz
parent fe235b58d5
commit ee5e8d812c
1 changed files with 8 additions and 7 deletions
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15
drivers/nfc/pn533.c
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@ -716,7 +716,7 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
void *arg, gfp_t flags)
{
struct pn533_cmd *cmd;
int rc;
int rc = 0;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
@ -729,16 +729,16 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
if (!rc)
dev->cmd_pending = 1;
mutex_unlock(&dev->cmd_lock);
return rc;
goto unlock;
}
nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
cmd = kzalloc(sizeof(struct pn533_cmd), flags);
if (!cmd)
return -ENOMEM;
if (!cmd) {
rc = -ENOMEM;
goto unlock;
}
INIT_LIST_HEAD(&cmd->queue);
cmd->out_frame = out_frame;
@ -750,9 +750,10 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
list_add_tail(&cmd->queue, &dev->cmd_queue);
unlock:
mutex_unlock(&dev->cmd_lock);
return 0;
return rc;
}
struct pn533_sync_cmd_response {