linux-kernel - [PATCH v1 3/5] media: uvcvideo: Return -EACCES for Wrong state error

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Message-Id: <20220920-resend-v4l2-compliance-v1-3-81364c15229b@chromium.org>
Date:   Tue, 20 Sep 2022 16:11:06 +0200
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Hans Verkuil <hans.verkuil@...co.com>,
        Ricardo Ribalda <ribalda@...omium.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 3/5] media: uvcvideo: Return -EACCES for Wrong state error

For error 2 (Wrong state) return -EACCES instead of -EILSEQ.
EACCES is a much more appropriate error code. EILSEQ will return
"Invalid or incomplete multibyte or wide character." in strerror(),
which is a *very* confusing message.

Suggested-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 2cf7f692c0bb..497073a50194 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -108,7 +108,7 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
 	case 1: /* Not ready */
 		return -EBUSY;
 	case 2: /* Wrong state */
-		return -EILSEQ;
+		return -EACCES;
 	case 3: /* Power */
 		return -EREMOTE;
 	case 4: /* Out of range */

-- 
b4 0.11.0-dev-d93f8