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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-08-28 23:38:58 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-10-20 22:14:14 +0200
commit20c809246a5d2dce876e2708c7044efd470e7866 (patch)
tree3774f2488fe1b9781b3309571c96e29fdd33df15
parent74df06daf632ce2d321d01cb046004768352efc4 (diff)
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: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-rw-r--r--drivers/media/usb/uvc/uvc_ctrl.c17
-rw-r--r--drivers/media/usb/uvc/uvc_v4l2.c19
2 files changed, 22 insertions, 14 deletions
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index f7061a5ef1d2..7879d306f1fc 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -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. */
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index f00db3060e0e..e5817b953938 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -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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