synclink: add mutex_unlock() on error path

There is a path which still holds its mutex here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index fef80cfcab5c..e63b830c86cc 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -691,8 +691,10 @@ static int open(struct tty_struct *tty, struct file *filp)
         if (info->port.count == 1) {
                 /* 1st open on this device, init hardware */
                 retval = startup(info);
-                if (retval < 0)
+                if (retval < 0) {
+                        mutex_unlock(&info->port.mutex);
                         goto cleanup;
+                }
         }
         mutex_unlock(&info->port.mutex);
         retval = block_til_ready(tty, filp, info);