V4L/DVB (13448): gspca - main: Add a gspca flag for inactive controls.

Signed-off-by: NJean-Francois Moine <moinejf@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/gspca.c

@@ -1158,10 +1158,13 @@ static int vidioc_queryctrl(struct file *file, void *priv,
 		}
 	} else {
 		ctrls = get_ctrl(gspca_dev, id);
+		i = ctrls - gspca_dev->sd_desc->ctrls;
 	}
 	if (ctrls == NULL)
 		return -EINVAL;
 	memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
+	if (gspca_dev->ctrl_inac & (1 << i))
+		q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
 	return 0;
 }
 

drivers/media/video/gspca/gspca.h

@@ -143,6 +143,7 @@ struct gspca_dev {
 	struct cam cam;				/* device information */
 	const struct sd_desc *sd_desc;		/* subdriver description */
 	unsigned ctrl_dis;		/* disabled controls (bit map) */
+	unsigned ctrl_inac;		/* inactive controls (bit map) */
 
 #define USB_BUF_SZ 64
 	__u8 *usb_buf;				/* buffer for USB exchanges */