[PATCH 003/139] rc: unlock on error in show_protocols()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter at oracle.com>

commit 30ebc5e44d057a1619ad63fe32c8c1670c37c4b8 upstream.

We recently introduced a new return -ENODEV in this function but we need
to unlock before returning.

[mchehab at redhat.com: found two patches with the same fix. Merged SOB's/acks into one patch]
Acked-by: Herton R. Krzesinski <herton.krzesinski at canonical.com>
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
Signed-off-by: Douglas Bagnall <douglas at paradise.net.nz>

Signed-off-by: Mauro Carvalho Chehab <mchehab at redhat.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/media/rc/rc-main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index cabc19c..cec1f8c 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -778,8 +778,10 @@ static ssize_t show_protocols(struct device *device,
 	} else if (dev->raw) {
 		enabled = dev->raw->enabled_protocols;
 		allowed = ir_raw_get_allowed_protocols();
-	} else
+	} else {
+		mutex_unlock(&dev->lock);
 		return -ENODEV;
+	}
 
 	IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n",
 		   (long long)allowed,
-- 
1.8.1.2