Commit ee5e8d81 authored by Szymon Janc's avatar Szymon Janc Committed by Samuel Ortiz
Browse files

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: default avatarSzymon Janc <szymon.janc@tieto.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent fe235b58

drivers/nfc/pn533.c

+8 −7
Original line number Diff line number Diff line
@@ -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 {