linux-kernel - [RFCv4 14/21] videodev2.h: add request_fd field to v4l2_ext

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Date:   Tue, 20 Feb 2018 13:44:18 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Pawel Osciak <posciak@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Gustavo Padovan <gustavo.padovan@...labora.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexandre Courbot <acourbot@...omium.org>
Subject: [RFCv4 14/21] videodev2.h: add request_fd field to v4l2_ext_controls

Allow to specify a request to be used with the S_EXT_CTRLS and
G_EXT_CTRLS operations.

Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
---
 drivers/media/v4l2-core/v4l2-ioctl.c | 2 +-
 include/uapi/linux/videodev2.h       | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 7bfeaf233d5a..2f40ac0cdf6e 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -870,7 +870,7 @@ static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 	__u32 i;
 
 	/* zero the reserved fields */
-	c->reserved[0] = c->reserved[1] = 0;
+	c->reserved[0] = 0;
 	for (i = 0; i < c->count; i++)
 		c->controls[i].reserved2[0] = 0;
 
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4fd46ae8fad5..91cfe0cbd5c5 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1592,7 +1592,8 @@ struct v4l2_ext_controls {
 	};
 	__u32 count;
 	__u32 error_idx;
-	__u32 reserved[2];
+	__s32 request_fd;
+	__u32 reserved[1];
 	struct v4l2_ext_control *controls;
 };
 
-- 
2.16.1.291.g4437f3f132-goog