linux-kernel - [PATCH 08/10] media: uvcvideo: Always return a value on V4L2_CTRL_WHICH_DEF

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Message-Id: <20210311122040.1264410-10-ribalda@chromium.org>
Date:   Thu, 11 Mar 2021 13:20:38 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, senozhatsky@...omium.org
Cc:     Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH 08/10] media: uvcvideo: Always return a value on V4L2_CTRL_WHICH_DEF_VAL

Fixes v4l2-compliance:
Control ioctls (Input 0):
                fail: v4l2-test-controls.cpp(813): doioctl(node, VIDIOC_G_EXT_CTRLS, &ctrls)
        test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/usb/uvc/uvc_v4l2.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 9b6454bb2f28..b500356fd06c 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -1057,12 +1057,7 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
 			struct v4l2_queryctrl qc = { .id = ctrl->id };
 
 			ret = uvc_query_v4l2_ctrl(chain, &qc);
-			if (ret < 0) {
-				ctrls->error_idx = i;
-				return ret;
-			}
-
-			ctrl->value = qc.default_value;
+			ctrl->value = (ret < 0) ? 0 : qc.default_value;
 		}
 
 		return 0;
-- 
2.31.0.rc2.261.g7f71774620-goog