[RFC/PATCH v3 1/7] v4l: subdev: Generic ioctl support

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Instead of returning an error when receiving an ioctl call with an
unsupported command, forward the call to the subdev core::ioctl handler.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 Documentation/video4linux/v4l2-framework.txt |    5 +++++
 drivers/media/video/v4l2-subdev.c            |    2 +-
 2 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt
index d0fb880..1bb5f22 100644
--- a/Documentation/video4linux/v4l2-framework.txt
+++ b/Documentation/video4linux/v4l2-framework.txt
@@ -407,6 +407,11 @@ VIDIOC_UNSUBSCRIBE_EVENT
 	To properly support events, the poll() file operation is also
 	implemented.
 
+Private ioctls
+
+	All ioctls not in the above list are passed directly to the sub-device
+	driver through the core::ioctl operation.
+
 
 I2C sub-device drivers
 ----------------------
diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c
index 438c70f..b57be91 100644
--- a/drivers/media/video/v4l2-subdev.c
+++ b/drivers/media/video/v4l2-subdev.c
@@ -267,7 +267,7 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 	}
 #endif
 	default:
-		return -ENOIOCTLCMD;
+		return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
 	}
 
 	return 0;
-- 
1.7.2.2