From: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
To: Ricardo Ribalda <ribalda@chromium.org>
Cc: 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 <linux-media@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Tomasz Figa <tfiga@chromium.org>,
Hans Verkuil <hverkuil@xs4all.nl>,
Hans Verkuil <hans.verkuil@cisco.com>
Subject: Re: [PATCH v9 19/22] uvcvideo: uvc_ctrl_is_accessible: check for INACTIVE
Date: Sat, 27 Mar 2021 13:26:23 +0100 [thread overview]
Message-ID: <CAPybu_1S0mLJQPhuz8dZfvVeybqsST0RBsXJKGi+FoFWivCQpw@mail.gmail.com> (raw)
In-Reply-To: <20210326095840.364424-20-ribalda@chromium.org>
Hello Hans
On Fri, Mar 26, 2021 at 11:01 AM Ricardo Ribalda <ribalda@chromium.org> wrote:
>
> From: Hans Verkuil <hverkuil@xs4all.nl>
>
> Check for inactive controls in uvc_ctrl_is_accessible().
> Use the new value for the master_id controls if present,
> otherwise use the existing value to determine if it is OK
> to set the control. Doing this here avoids attempting to
> set an inactive control, which will return an error from the
> USB device.
>
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> ---
> drivers/media/usb/uvc/uvc_ctrl.c | 28 +++++++++++++++++++++++++++-
> drivers/media/usb/uvc/uvc_v4l2.c | 4 ++--
> drivers/media/usb/uvc/uvcvideo.h | 3 ++-
> 3 files changed, 31 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index d9d4add1e813..6e7b904bc33d 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1047,10 +1047,18 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
> }
>
> int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
> - bool read)
> + const struct v4l2_ext_controls *ctrls,
> + unsigned long ioctl)
> {
> + struct uvc_control_mapping *master_map = NULL;
> + struct uvc_control *master_ctrl = NULL;
> struct uvc_control_mapping *mapping;
> struct uvc_control *ctrl;
> + bool read = ioctl == VIDIOC_G_EXT_CTRLS;
> + bool try = ioctl == VIDIOC_TRY_EXT_CTRLS;
> + s32 val;
> + int ret;
> + int i;
>
> if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
> return -EACCES;
> @@ -1065,6 +1073,24 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
> if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
> return -EACCES;
>
> + if (read || try || !mapping->master_id)
> + return 0;
> +
> + for (i = ctrls->count - 1; i >= 0; i--)
> + if (ctrls->controls[i].id == mapping->master_id)
> + return ctrls->controls[i].value ==
> + mapping->master_manual ? 0 : -EACCES;
> +
> + __uvc_find_control(ctrl->entity, mapping->master_id, &master_map,
> + &master_ctrl, 0);
> +
> + if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
> + return 0;
> +
> + ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
> + if (ret >= 0 && val != mapping->master_manual)
> + return -EACCES;
Maybe we could use uvc_ctrl_is_inactive().
Please checkout:
https://git.kernel.org/pub/scm/linux/kernel/git/ribalda/linux.git/commit/?h=uvc-compliance-v10&id=f49f7c84ece18df72094a18011f2fbeb20dc1b15
and if you like it better that will be what I resend for v10 ;)
Thanks!
> +
> return 0;
> }
>
> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
> index 8d8b12a4db34..0f4d893eff46 100644
> --- a/drivers/media/usb/uvc/uvc_v4l2.c
> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
> @@ -1000,8 +1000,8 @@ static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
> int ret = 0;
>
> for (i = 0; i < ctrls->count; ++ctrl, ++i) {
> - ret = uvc_ctrl_is_accessible(chain, ctrl->id,
> - ioctl == VIDIOC_G_EXT_CTRLS);
> + ret = uvc_ctrl_is_accessible(chain, ctrl->id, ctrls,
> + ioctl);
> if (ret)
> break;
> }
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index 0313b30f0cea..20bc681315fb 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -901,7 +901,8 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
> int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
> int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
> int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
> - bool read);
> + const struct v4l2_ext_controls *ctrls,
> + unsigned long ioctl);
>
> int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
> struct uvc_xu_control_query *xqry);
> --
> 2.31.0.291.g576ba9dcdaf-goog
>
--
Ricardo Ribalda
next prev parent reply other threads:[~2021-03-27 12:26 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 9:58 [PATCH v9 00/22] uvcvideo: Fix v4l2-compliance errors Ricardo Ribalda
2021-03-26 9:58 ` [PATCH v9 01/22] media: v4l2-ioctl: Fix check_ext_ctrls Ricardo Ribalda
2021-06-10 16:19 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 02/22] media: pvrusb2: Do not check for V4L2_CTRL_WHICH_DEF_VAL Ricardo Ribalda
2021-06-10 17:29 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 03/22] media: uvcvideo: " Ricardo Ribalda
2021-06-10 16:21 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 04/22] media: v4l2-ioctl: S_CTRL output the right value Ricardo Ribalda
2021-06-10 16:23 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 05/22] media: uvcvideo: Remove s_ctrl and g_ctrl Ricardo Ribalda
2021-06-10 16:24 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 06/22] media: uvcvideo: Set capability in s_param Ricardo Ribalda
2021-03-26 9:58 ` [PATCH v9 07/22] media: uvcvideo: Return -EIO for control errors Ricardo Ribalda
2021-03-26 9:58 ` [PATCH v9 08/22] media: uvcvideo: refactor __uvc_ctrl_add_mapping Ricardo Ribalda
2021-03-26 9:58 ` [PATCH v9 09/22] media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS Ricardo Ribalda
2021-06-10 16:42 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 10/22] media: uvcvideo: Use dev->name for querycap() Ricardo Ribalda
2021-06-10 16:44 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 11/22] media: uvcvideo: Set unique vdev name based in type Ricardo Ribalda
2021-06-10 16:45 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 12/22] media: uvcvideo: Increase the size of UVC_METADATA_BUF_SIZE Ricardo Ribalda
2021-06-10 16:48 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 13/22] media: uvcvideo: Use control names from framework Ricardo Ribalda
2021-06-10 16:50 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 14/22] media: uvcvideo: Check controls flags before accessing them Ricardo Ribalda
2021-06-10 16:55 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 15/22] media: uvcvideo: Set error_idx during ctrl_commit errors Ricardo Ribalda
2021-06-10 17:05 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 16/22] media: uvcvideo: Return -EACCES to inactive controls Ricardo Ribalda
2021-03-27 11:23 ` Hans Verkuil
2021-06-10 17:28 ` Laurent Pinchart
2021-06-10 18:40 ` Ricardo Ribalda
2021-06-10 19:47 ` Ricardo Ribalda Delgado
2021-03-26 9:58 ` [PATCH v9 17/22] media: docs: Document the behaviour of uvcdriver Ricardo Ribalda
2021-03-27 11:19 ` Hans Verkuil
2021-03-27 12:01 ` Ricardo Ribalda
2021-03-27 12:03 ` Hans Verkuil
2021-06-10 17:08 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 18/22] media: uvcvideo: Downgrade control error messages Ricardo Ribalda
2021-03-27 11:19 ` Hans Verkuil
2021-06-10 16:59 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 19/22] uvcvideo: uvc_ctrl_is_accessible: check for INACTIVE Ricardo Ribalda
2021-03-27 12:26 ` Ricardo Ribalda Delgado [this message]
2021-03-26 9:58 ` [PATCH v9 20/22] uvcvideo: improve error handling in uvc_query_ctrl() Ricardo Ribalda
2021-06-10 17:14 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 21/22] uvcvideo: don't spam the log in uvc_ctrl_restore_values() Ricardo Ribalda
2021-06-10 16:57 ` Laurent Pinchart
2021-03-26 9:58 ` [PATCH v9 22/22] uvc: use vb2 ioctl and fop helpers Ricardo Ribalda
2021-04-02 2:50 ` Tomasz Figa
2021-05-25 8:06 ` [PATCH v9 00/22] uvcvideo: Fix v4l2-compliance errors Tomasz Figa
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