V4L/DVB: drivers/video/omap2/displays: add missing mutex_unlock

Add a mutex_unlock missing on the error paths.  The use of the mutex is
balanced elsewhere in the file.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E1;
@@

* mutex_lock(E1,...);
  <+... when != E1
  if (...) {
    ... when != E1
*   return ...;
  }
  ...+>
* mutex_unlock(E1,...);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Mike Isely <isely@pobox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c
index 1f8eb70e293..07fbb8a733b 100644
--- a/drivers/video/omap2/displays/panel-acx565akm.c
+++ b/drivers/video/omap2/displays/panel-acx565akm.c
@@ -592,7 +592,7 @@ static int acx_panel_power_on(struct omap_dss_device *dssdev)
         r = omapdss_sdi_display_enable(dssdev);
         if (r) {
                 pr_err("%s sdi enable failed\n", __func__);
-                return r;
+                goto fail_unlock;
         }
 
         /*FIXME tweak me */
@@ -633,6 +633,8 @@ static int acx_panel_power_on(struct omap_dss_device *dssdev)
         return acx565akm_bl_update_status(md->bl_dev);
 fail:
         omapdss_sdi_display_disable(dssdev);
+fail_unlock:
+        mutex_unlock(&md->mutex);
         return r;
 }