diff options
Diffstat (limited to 'drivers/media/common')
| -rw-r--r-- | drivers/media/common/cx2341x.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/media/common/cx2341x.c b/drivers/media/common/cx2341x.c index be763150b8aa..c07b9db51b05 100644 --- a/drivers/media/common/cx2341x.c +++ b/drivers/media/common/cx2341x.c @@ -931,6 +931,35 @@ static void cx2341x_calc_audio_properties(struct cx2341x_mpeg_params *params) } } +/* Check for correctness of the ctrl's value based on the data from + struct v4l2_queryctrl and the available menu items. Note that + menu_items may be NULL, in that case it is ignored. */ +static int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl, + const char * const *menu_items) +{ + if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED) + return -EINVAL; + if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED) + return -EBUSY; + if (qctrl->type == V4L2_CTRL_TYPE_STRING) + return 0; + if (qctrl->type == V4L2_CTRL_TYPE_BUTTON || + qctrl->type == V4L2_CTRL_TYPE_INTEGER64 || + qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) + return 0; + if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum) + return -ERANGE; + if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) { + if (menu_items[ctrl->value] == NULL || + menu_items[ctrl->value][0] == '\0') + return -EINVAL; + } + if (qctrl->type == V4L2_CTRL_TYPE_BITMASK && + (ctrl->value & ~qctrl->maximum)) + return -ERANGE; + return 0; +} + int cx2341x_ext_ctrls(struct cx2341x_mpeg_params *params, int busy, struct v4l2_ext_controls *ctrls, unsigned int cmd) { |