USB: wusbcore/wa-xfer, fix lock imbalance

Fix locking on one wa_urb_enqueue_b's fail path. There was omitted unlock.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index 238a96aee3a1..613a5fc490d3 100644
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -921,8 +921,10 @@ static void wa_urb_enqueue_b(struct wa_xfer *xfer)
         result = -ENODEV;
         /* FIXME: segmentation broken -- kills DWA */
         mutex_lock(&wusbhc->mutex);             /* get a WUSB dev */
-        if (urb->dev == NULL)
+        if (urb->dev == NULL) {
+                mutex_unlock(&wusbhc->mutex);
                 goto error_dev_gone;
+        }
         wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev);
         if (wusb_dev == NULL) {
                 mutex_unlock(&wusbhc->mutex);