1 files changed, 14 insertions, 12 deletions

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index e59a463c2761..4b685f883e4d 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -836,7 +836,7 @@ static s32 uvc_get_le_value(struct uvc_control_mapping *mapping,
 	while (1) {
 		u8 byte = *data & mask;
 		value |= offset > 0 ? (byte >> offset) : (byte << (-offset));
-		bits -= 8 - (offset > 0 ? offset : 0);
+		bits -= 8 - max(offset, 0);
 		if (bits <= 0)
 			break;
 
@@ -1850,16 +1850,18 @@ int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
 	list_for_each_entry(entity, &chain->entities, chain) {
 		ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback,
 					     &err_ctrl);
-		if (ret < 0)
+		if (ret < 0) {
+			if (ctrls)
+				ctrls->error_idx =
+					uvc_ctrl_find_ctrl_idx(entity, ctrls,
+							       err_ctrl);
 			goto done;
+		}
 	}
 
 	if (!rollback)
 		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;
 }
@@ -2165,7 +2167,7 @@ static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev,
 int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 	struct uvc_xu_control_query *xqry)
 {
-	struct uvc_entity *entity;
+	struct uvc_entity *entity, *iter;
 	struct uvc_control *ctrl;
 	unsigned int i;
 	bool found;
@@ -2175,16 +2177,16 @@ int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 	int ret;
 
 	/* Find the extension unit. */
-	found = false;
-	list_for_each_entry(entity, &chain->entities, chain) {
-		if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT &&
-		    entity->id == xqry->unit) {
-			found = true;
+	entity = NULL;
+	list_for_each_entry(iter, &chain->entities, chain) {
+		if (UVC_ENTITY_TYPE(iter) == UVC_VC_EXTENSION_UNIT &&
+		    iter->id == xqry->unit) {
+			entity = iter;
 			break;
 		}
 	}
 
-	if (!found) {
+	if (!entity) {
 		uvc_dbg(chain->dev, CONTROL, "Extension unit %u not found\n",
 			xqry->unit);
 		return -ENOENT;