diff options
| -rw-r--r-- | drivers/media/video/v4l2-common.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c index 13ee550d321..d2915d3530e 100644 --- a/drivers/media/video/v4l2-common.c +++ b/drivers/media/video/v4l2-common.c @@ -939,16 +939,25 @@ int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qc When no more controls are available 0 is returned. */ u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id) { - u32 ctrl_class; + u32 ctrl_class = V4L2_CTRL_ID2CLASS(id); const u32 *pctrl; - /* if no query is desired, then just return the control ID */ - if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) - return id; if (ctrl_classes == NULL) return 0; + + /* if no query is desired, then check if the ID is part of ctrl_classes */ + if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) { + /* find class */ + while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class) + ctrl_classes++; + if (*ctrl_classes == NULL) + return 0; + pctrl = *ctrl_classes; + /* find control ID */ + while (*pctrl && *pctrl != id) pctrl++; + return *pctrl ? id : 0; + } id &= V4L2_CTRL_ID_MASK; - ctrl_class = V4L2_CTRL_ID2CLASS(id); id++; /* select next control */ /* find first class that matches (or is greater than) the class of the ID */ |