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author | Ricardo Ribalda <ribalda@chromium.org> | 2021-06-18 14:29:17 +0200 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-09-30 10:07:48 +0200 |
commit | 6350d6a4ed487d16a3a021f76a7edcb9cb60fdbf (patch) | |
tree | 1aaea36d7aeda79ff60fd2632c7431f850a07a14 /drivers/media/usb | |
parent | ee929d5a10ca433a1c21b9aaeb70a67c5507c101 (diff) | |
download | linux-stable-6350d6a4ed487d16a3a021f76a7edcb9cb60fdbf.tar.gz linux-stable-6350d6a4ed487d16a3a021f76a7edcb9cb60fdbf.tar.bz2 linux-stable-6350d6a4ed487d16a3a021f76a7edcb9cb60fdbf.zip |
media: uvcvideo: Set error_idx during ctrl_commit errors
If we have an error setting a control, return the affected control in
the error_idx field.
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>
Diffstat (limited to 'drivers/media/usb')
-rw-r--r-- | drivers/media/usb/uvc/uvc_ctrl.c | 42 | ||||
-rw-r--r-- | drivers/media/usb/uvc/uvc_v4l2.c | 2 | ||||
-rw-r--r-- | drivers/media/usb/uvc/uvcvideo.h | 10 |
3 files changed, 40 insertions, 14 deletions
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 18c315b52ef5..dd6ebcc7344a 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1582,7 +1582,7 @@ int uvc_ctrl_begin(struct uvc_video_chain *chain) } static int uvc_ctrl_commit_entity(struct uvc_device *dev, - struct uvc_entity *entity, int rollback) + struct uvc_entity *entity, int rollback, struct uvc_control **err_ctrl) { struct uvc_control *ctrl; unsigned int i; @@ -1624,31 +1624,59 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, ctrl->dirty = 0; - if (ret < 0) + if (ret < 0) { + if (err_ctrl) + *err_ctrl = ctrl; return ret; + } } return 0; } +static int uvc_ctrl_find_ctrl_idx(struct uvc_entity *entity, + struct v4l2_ext_controls *ctrls, + struct uvc_control *uvc_control) +{ + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl_found; + unsigned int i; + + if (!entity) + return ctrls->count; + + for (i = 0; i < ctrls->count; i++) { + __uvc_find_control(entity, ctrls->controls[i].id, &mapping, + &ctrl_found, 0); + if (uvc_control == ctrl_found) + return i; + } + + return ctrls->count; +} + int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, - const struct v4l2_ext_control *xctrls, - unsigned int xctrls_count) + struct v4l2_ext_controls *ctrls) { struct uvc_video_chain *chain = handle->chain; + struct uvc_control *err_ctrl; struct uvc_entity *entity; int ret = 0; /* Find the control. */ list_for_each_entry(entity, &chain->entities, chain) { - ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); + ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback, + &err_ctrl); if (ret < 0) goto done; } if (!rollback) - uvc_ctrl_send_events(handle, xctrls, xctrls_count); + uvc_ctrl_send_events(handle, ctrls->controls, ctrls->count); done: + if (ret < 0 && ctrls) + ctrls->error_idx = uvc_ctrl_find_ctrl_idx(entity, ctrls, + err_ctrl); mutex_unlock(&chain->ctrl_mutex); return ret; } @@ -2106,7 +2134,7 @@ int uvc_ctrl_restore_values(struct uvc_device *dev) ctrl->dirty = 1; } - ret = uvc_ctrl_commit_entity(dev, entity, 0); + ret = uvc_ctrl_commit_entity(dev, entity, 0, NULL); if (ret < 0) return ret; } diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index c10a638fff22..f4e4aff8ddf7 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -1100,7 +1100,7 @@ static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, ctrls->error_idx = 0; if (ioctl == VIDIOC_S_EXT_CTRLS) - return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count); + return uvc_ctrl_commit(handle, ctrls); else return uvc_ctrl_rollback(handle); } diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 4aa78591d9b0..2e5366143b81 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -886,17 +886,15 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain, int uvc_ctrl_begin(struct uvc_video_chain *chain); int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, - const struct v4l2_ext_control *xctrls, - unsigned int xctrls_count); + struct v4l2_ext_controls *ctrls); static inline int uvc_ctrl_commit(struct uvc_fh *handle, - const struct v4l2_ext_control *xctrls, - unsigned int xctrls_count) + struct v4l2_ext_controls *ctrls) { - return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count); + return __uvc_ctrl_commit(handle, 0, ctrls); } static inline int uvc_ctrl_rollback(struct uvc_fh *handle) { - return __uvc_ctrl_commit(handle, 1, NULL, 0); + return __uvc_ctrl_commit(handle, 1, NULL); } int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); |