[62/71] [media] v4l: Release module if subdev registration fails

[Greg KH]

2.6.38-stable review patch.  If anyone has any objections, please let us know.

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

From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

commit b7534f002d3c81d18abfbf57179d07d3ec763bb5 upstream.

If v4l2_device_register_subdev() fails, the reference to the subdev
module taken by the function isn't released. Fix this.

Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Acked-by: Hans Verkuil <hverkuil@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/media/video/v4l2-device.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/media/video/v4l2-device.c
+++ b/drivers/media/video/v4l2-device.c
@@ -131,14 +131,17 @@ int v4l2_device_register_subdev(struct v
 	sd->v4l2_dev = v4l2_dev;
 	if (sd->internal_ops && sd->internal_ops->registered) {
 		err = sd->internal_ops->registered(sd);
-		if (err)
+		if (err) {
+			module_put(sd->owner);
 			return err;
+		}
 	}
 	/* This just returns 0 if either of the two args is NULL */
 	err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler);
 	if (err) {
 		if (sd->internal_ops && sd->internal_ops->unregistered)
 			sd->internal_ops->unregistered(sd);
+		module_put(sd->owner);
 		return err;
 	}
 	spin_lock(&v4l2_dev->lock);


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/