This is a note to let you know that I've just added the patch titled

media: v4l2-ctrl: Fix flags field on Control events

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: media-v4l2-ctrl-fix-flags-field-on-control-events.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 9cac9d2fb2fe0e0cadacdb94415b3fe49e3f724f Mon Sep 17 00:00:00 2001

From: Ricardo Ribalda ricardo.ribalda@gmail.com Date: Tue, 17 Oct 2017 11:48:50 -0400 Subject: media: v4l2-ctrl: Fix flags field on Control events

From: Ricardo Ribalda Delgado ricardo.ribalda@gmail.com

commit 9cac9d2fb2fe0e0cadacdb94415b3fe49e3f724f upstream.

VIDIOC_DQEVENT and VIDIOC_QUERY_EXT_CTRL should give the same output for the control flags field.

This patch creates a new function user_flags(), that calculates the user exported flags value (which is different than the kernel internal flags structure). This function is then used by all the code that exports the internal flags to userspace.

Reported-by: Dimitrios Katsaros patcherwork@gmail.com Signed-off-by: Ricardo Ribalda Delgado ricardo.ribalda@gmail.com Signed-off-by: Hans Verkuil hans.verkuil@cisco.com Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/media/v4l2-core/v4l2-ctrls.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -1200,6 +1200,16 @@ void v4l2_ctrl_fill(u32 id, const char * } EXPORT_SYMBOL(v4l2_ctrl_fill);

+static u32 user_flags(const struct v4l2_ctrl *ctrl) +{ + u32 flags = ctrl->flags; + + if (ctrl->is_ptr) + flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD; + + return flags; +} + static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes) { memset(ev->reserved, 0, sizeof(ev->reserved)); @@ -1207,7 +1217,7 @@ static void fill_event(struct v4l2_event ev->id = ctrl->id; ev->u.ctrl.changes = changes; ev->u.ctrl.type = ctrl->type; - ev->u.ctrl.flags = ctrl->flags; + ev->u.ctrl.flags = user_flags(ctrl); if (ctrl->is_ptr) ev->u.ctrl.value64 = 0; else @@ -2536,10 +2546,8 @@ int v4l2_query_ext_ctrl(struct v4l2_ctrl else qc->id = ctrl->id; strlcpy(qc->name, ctrl->name, sizeof(qc->name)); - qc->flags = ctrl->flags; + qc->flags = user_flags(ctrl); qc->type = ctrl->type; - if (ctrl->is_ptr) - qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD; qc->elem_size = ctrl->elem_size; qc->elems = ctrl->elems; qc->nr_of_dims = ctrl->nr_of_dims;

Patches currently in stable-queue which might be from ricardo.ribalda@gmail.com are

queue-4.4/media-v4l2-ctrl-fix-flags-field-on-control-events.patch