linux-kernel - [PATCH] [media] v4l2-async: Don't fail if registered

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Message-Id: <1455648666-4377-1-git-send-email-javier@osg.samsung.com>
Date:	Tue, 16 Feb 2016 15:51:05 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Benoit Parrot <bparrot@...com>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Sakari Ailus <sakari.ailus@....fi>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Bryan Wu <cooloney@...il.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	linux-media@...r.kernel.org
Subject: [PATCH] [media] v4l2-async: Don't fail if registered_async isn't implemented

After sub-dev registration in v4l2_async_test_notify(), the v4l2-async
core calls the registered_async callback but if a sub-dev driver does
not implement it, v4l2_subdev_call() will return a -ENOIOCTLCMD which
should not be considered an error.

Reported-by: Benoit Parrot <bparrot@...com>
Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>

---

 drivers/media/v4l2-core/v4l2-async.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 716bfd47daab..4d809115ba49 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -113,7 +113,7 @@ static int v4l2_async_test_notify(struct v4l2_async_notifier *notifier,
 	list_move(&sd->async_list, &notifier->done);
 
 	ret = v4l2_device_register_subdev(notifier->v4l2_dev, sd);
-	if (ret < 0) {
+	if (ret < 0 && ret != -ENOIOCTLCMD) {
 		if (notifier->unbind)
 			notifier->unbind(notifier, sd, asd);
 		return ret;
-- 
2.5.0