From c87ed93574e3cd8346c05bd934c617596c12541b Mon Sep 17 00:00:00 2001
From: Ricardo Ribalda <ribalda@chromium.org>
Date: Fri, 18 Jun 2021 14:29:06 +0200
Subject: [PATCH] media: v4l2-ioctl: S_CTRL output the right value
Git-commit: c87ed93574e3cd8346c05bd934c617596c12541b
Patch-mainline: v5.16-rc1
References: git-fixes
If the driver does not implement s_ctrl, but it does implement
s_ext_ctrls, we convert the call.
When that happens we have also to convert back the response from
s_ext_ctrls.
Fixes v4l2_compliance:
Control ioctls (Input 0):
fail: v4l2-test-controls.cpp(411): returned control value out of range
fail: v4l2-test-controls.cpp(507): invalid control 00980900
test VIDIOC_G/S_CTRL: FAIL
Fixes: 35ea11ff8471 ("V4L/DVB (8430): videodev: move some functions from v4l2-dev.h to v4l2-common.h or v4l2-ioctl.h")
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index dc817f8ba9d7..bc83d23ce25d 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2226,6 +2226,7 @@ static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
struct v4l2_ext_controls ctrls;
struct v4l2_ext_control ctrl;
+ int ret;
if (vfh && vfh->ctrl_handler)
return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
@@ -2241,9 +2242,11 @@ static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
ctrls.controls = &ctrl;
ctrl.id = p->id;
ctrl.value = p->value;
- if (check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
- return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
- return -EINVAL;
+ if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
+ return -EINVAL;
+ ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
+ p->value = ctrl.value;
+ return ret;
}
static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
--
2.26.2