From: Ricardo Ribalda <ribalda@chromium.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
tfiga@chromium.org
Cc: Ricardo Ribalda <ribalda@chromium.org>, stable@vger.kernel.org
Subject: [PATCH v6 03/17] media: v4l2-ioctl: check_ext_ctrls: Return the right error_idx
Date: Wed, 17 Mar 2021 17:44:57 +0100 [thread overview]
Message-ID: <20210317164511.39967-4-ribalda@chromium.org> (raw)
In-Reply-To: <20210317164511.39967-1-ribalda@chromium.org>
Drivers that do not use the ctrl-framework use this function instead.
- Return the right error_idx
If an error is found when validating the list of controls passed with
VIDIOC_G_EXT_CTRLS, then error_idx shall be set to ctrls->count to
indicate to userspace that no actual hardware was touched.
It would have been much nicer of course if error_idx could point to the
control index that failed the validation, but sadly that's not how the
API was designed.
Fixes v4l2-compliance:
Control ioctls (Input 0):
warn: v4l2-test-controls.cpp(834): error_idx should be equal to count
warn: v4l2-test-controls.cpp(855): error_idx should be equal to count
Cc: stable@vger.kernel.org
Fixes: 6fa6f831f095 ("media: v4l2-ctrls: add core request support")
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 76e2e595d88d..528eb5f420f6 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -932,13 +932,14 @@ static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
case V4L2_CTRL_WHICH_CUR_VAL:
return true;
case V4L2_CTRL_WHICH_REQUEST_VAL:
+ c->error_idx = c->count;
return false;
}
/* Check that all controls are from the same control class. */
for (i = 0; i < c->count; i++) {
if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
- c->error_idx = i;
+ c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : c->count;
return false;
}
}
--
2.31.0.rc2.261.g7f71774620-goog
next prev parent reply other threads:[~2021-03-17 16:46 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 16:44 [PATCH v6 00/17] uvcvideo: Fix v4l2-compliance errors Ricardo Ribalda
2021-03-17 16:44 ` [PATCH v6 01/17] media: v4l2-ioctl: check_ext_ctrls: Fix multiclass V4L2_CTRL_WHICH_DEF_VAL Ricardo Ribalda
2021-03-18 7:14 ` Hans Verkuil
2021-03-18 7:17 ` Ricardo Ribalda
2021-03-18 7:48 ` Hans Verkuil
2021-03-18 7:49 ` Ricardo Ribalda
2021-03-17 16:44 ` [PATCH v6 02/17] media: v4l2-ioctl: check_ext_ctrls: Return -EINVAL on V4L2_CTRL_WHICH_REQUEST_VAL Ricardo Ribalda
2021-03-17 16:44 ` Ricardo Ribalda [this message]
2021-03-17 16:44 ` [PATCH v6 04/17] media: v4l2-ioctl: check_ext_ctrls: Fix V4L2_CTRL_WHICH_DEF_VAL Ricardo Ribalda
2021-03-17 16:44 ` [PATCH v6 05/17] media: pvrusb2: Do not check for V4L2_CTRL_WHICH_DEF_VAL Ricardo Ribalda
2021-03-18 7:16 ` Hans Verkuil
2021-03-17 16:45 ` [PATCH v6 06/17] media: uvcvideo: " Ricardo Ribalda
2021-03-18 7:16 ` Hans Verkuil
2021-03-17 16:45 ` [PATCH v6 07/17] media: uvcvideo: Set capability in s_param Ricardo Ribalda
2021-03-17 16:45 ` [PATCH v6 08/17] media: uvcvideo: Return -EIO for control errors Ricardo Ribalda
2021-03-17 16:45 ` [PATCH v6 09/17] media: uvcvideo: refactor __uvc_ctrl_add_mapping Ricardo Ribalda
2021-03-18 7:23 ` Hans Verkuil
2021-03-17 16:45 ` [PATCH v6 10/17] media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS Ricardo Ribalda
2021-03-17 16:45 ` [PATCH v6 11/17] media: uvcvideo: Use dev->name for querycap() Ricardo Ribalda
2021-03-18 8:05 ` Hans Verkuil
2021-03-17 16:45 ` [PATCH v6 12/17] media: uvcvideo: Set unique vdev name based in type Ricardo Ribalda
2021-03-17 16:45 ` [PATCH v6 13/17] media: uvcvideo: Increase the size of UVC_METADATA_BUF_SIZE Ricardo Ribalda
2021-03-17 16:45 ` [PATCH v6 14/17] media: uvcvideo: Use control names from framework Ricardo Ribalda
2021-03-17 16:45 ` [PATCH v6 15/17] media: uvcvideo: Check controls flags before accessing them Ricardo Ribalda
2021-03-18 7:27 ` Hans Verkuil
2021-03-17 16:45 ` [PATCH v6 16/17] media: uvcvideo: Return -EACCES to inactive controls Ricardo Ribalda
2021-03-18 7:39 ` Hans Verkuil
2021-03-18 9:09 ` Hans Verkuil
2021-03-17 16:45 ` [PATCH v6 17/17] uvc: use vb2 ioctl and fop helpers Ricardo Ribalda
2021-03-18 9:23 ` [PATCH v6 00/17] uvcvideo: Fix v4l2-compliance errors Hans Verkuil
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210317164511.39967-4-ribalda@chromium.org \
--to=ribalda@chromium.org \
--cc=hverkuil-cisco@xs4all.nl \
--cc=laurent.pinchart@ideasonboard.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=sergey.senozhatsky@gmail.com \
--cc=stable@vger.kernel.org \
--cc=tfiga@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).