提交 f0ed2ce8 编写于 作者: L Laurent Pinchart 提交者: Mauro Carvalho Chehab

[media] uvcvideo: Set error_idx properly for extended controls API failures

When one of the requested controls doesn't exist the error_idx field
must reflect that situation. For G_EXT_CTRLS and S_EXT_CTRLS, error_idx
must be set to the control count. For TRY_EXT_CTRLS, it must be set to
the index of the unexisting control.
This issue was found by the v4l2-compliance tool.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
上级 e9de0516
......@@ -1061,7 +1061,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
if (ctrl == NULL) {
ret = -EINVAL;
ret = -ENOENT;
goto done;
}
......@@ -1099,12 +1099,13 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
return -ERESTARTSYS;
ctrl = uvc_find_control(chain, query_menu->id, &mapping);
if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) {
ret = -EINVAL;
if (ctrl == NULL) {
ret = -ENOENT;
goto done;
}
if (query_menu->index >= mapping->menu_count) {
if (mapping->v4l2_type != V4L2_CTRL_TYPE_MENU ||
query_menu->index >= mapping->menu_count) {
ret = -EINVAL;
goto done;
}
......@@ -1263,7 +1264,7 @@ static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
ctrl = uvc_find_control(handle->chain, sev->id, &mapping);
if (ctrl == NULL) {
ret = -EINVAL;
ret = -ENOENT;
goto done;
}
......@@ -1414,7 +1415,7 @@ int uvc_ctrl_get(struct uvc_video_chain *chain,
ctrl = uvc_find_control(chain, xctrl->id, &mapping);
if (ctrl == NULL)
return -EINVAL;
return -ENOENT;
return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value);
}
......@@ -1431,7 +1432,9 @@ int uvc_ctrl_set(struct uvc_video_chain *chain,
int ret;
ctrl = uvc_find_control(chain, xctrl->id, &mapping);
if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) == 0)
if (ctrl == NULL)
return -ENOENT;
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
return -EINVAL;
/* Clamp out of range values. */
......
......@@ -591,8 +591,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
ret = uvc_ctrl_get(chain, &xctrl);
uvc_ctrl_rollback(handle);
if (ret >= 0)
ctrl->value = xctrl.value;
if (ret < 0)
return ret == -ENOENT ? -EINVAL : ret;
ctrl->value = xctrl.value;
break;
}
......@@ -612,7 +614,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
ret = uvc_ctrl_set(chain, &xctrl);
if (ret < 0) {
uvc_ctrl_rollback(handle);
return ret;
return ret == -ENOENT ? -EINVAL : ret;
}
ret = uvc_ctrl_commit(handle, &xctrl, 1);
if (ret == 0)
......@@ -637,8 +639,9 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
ret = uvc_ctrl_get(chain, ctrl);
if (ret < 0) {
uvc_ctrl_rollback(handle);
ctrls->error_idx = i;
return ret;
ctrls->error_idx = ret == -ENOENT
? ctrls->count : i;
return ret == -ENOENT ? -EINVAL : ret;
}
}
ctrls->error_idx = 0;
......@@ -661,8 +664,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
ret = uvc_ctrl_set(chain, ctrl);
if (ret < 0) {
uvc_ctrl_rollback(handle);
ctrls->error_idx = i;
return ret;
ctrls->error_idx = (ret == -ENOENT &&
cmd == VIDIOC_S_EXT_CTRLS)
? ctrls->count : i;
return ret == -ENOENT ? -EINVAL : ret;
}
}
......
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