V4L/DVB (9957): v4l2-subdev: add g_sliced_vbi_cap and add NULL pointe…

…r checks

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-subdev.c

@@ -40,13 +40,13 @@ int v4l2_subdev_command(struct v4l2_subdev *sd, unsigned cmd, void *arg)
 	case VIDIOC_G_CHIP_IDENT:
 		return v4l2_subdev_call(sd, core, g_chip_ident, arg);
 	case VIDIOC_INT_S_STANDBY:
-		return v4l2_subdev_call(sd, core, s_standby, *(u32 *)arg);
+		return v4l2_subdev_call(sd, core, s_standby, arg ? (*(u32 *)arg) : 0);
 	case VIDIOC_INT_RESET:
-		return v4l2_subdev_call(sd, core, reset, *(u32 *)arg);
+		return v4l2_subdev_call(sd, core, reset, arg ? (*(u32 *)arg) : 0);
 	case VIDIOC_INT_S_GPIO:
-		return v4l2_subdev_call(sd, core, s_gpio, *(u32 *)arg);
+		return v4l2_subdev_call(sd, core, s_gpio, arg ? (*(u32 *)arg) : 0);
 	case VIDIOC_INT_INIT:
-		return v4l2_subdev_call(sd, core, init, *(u32 *)arg);
+		return v4l2_subdev_call(sd, core, init, arg ? (*(u32 *)arg) : 0);
 #ifdef CONFIG_VIDEO_ADV_DEBUG
 	case VIDIOC_DBG_G_REGISTER:
 		return v4l2_subdev_call(sd, core, g_register, arg);
@@ -90,6 +90,8 @@ int v4l2_subdev_command(struct v4l2_subdev *sd, unsigned cmd, void *arg)
 		return v4l2_subdev_call(sd, video, s_vbi_data, arg);
 	case VIDIOC_INT_G_VBI_DATA:
 		return v4l2_subdev_call(sd, video, g_vbi_data, arg);
+	case VIDIOC_G_SLICED_VBI_CAP:
+		return v4l2_subdev_call(sd, video, g_sliced_vbi_cap, arg);
 	case VIDIOC_S_FMT:
 		return v4l2_subdev_call(sd, video, s_fmt, arg);
 	case VIDIOC_G_FMT:

include/media/v4l2-subdev.h

@@ -110,6 +110,7 @@ struct v4l2_subdev_video_ops {
 	int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line);
 	int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data);
 	int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data);
+	int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap);
 	int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std);
 	int (*s_stream)(struct v4l2_subdev *sd, int enable);
 	int (*s_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt);