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Commit cf439d5f authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

[media] media: Determine early whether an IOCTL is supported 



Preparation for refactoring media IOCTL handling to unify common parts.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 2950da48

drivers/media/media-device.c

+20 −0
Original line number Diff line number Diff line
@@ -419,6 +419,22 @@ static long media_device_get_topology(struct media_device *mdev, 
	return 0;

}



#define MEDIA_IOC(__cmd) \

	[_IOC_NR(MEDIA_IOC_##__cmd)] = { .cmd = MEDIA_IOC_##__cmd }



/* the table is indexed by _IOC_NR(cmd) */

struct media_ioctl_info {

	unsigned int cmd;

};



static const struct media_ioctl_info ioctl_info[] = {

	MEDIA_IOC(DEVICE_INFO),

	MEDIA_IOC(ENUM_ENTITIES),

	MEDIA_IOC(ENUM_LINKS),

	MEDIA_IOC(SETUP_LINK),

	MEDIA_IOC(G_TOPOLOGY),

};



static long media_device_ioctl(struct file *filp, unsigned int cmd,

			       unsigned long arg)

{
@@ -426,6 +442,10 @@ static long media_device_ioctl(struct file *filp, unsigned int cmd, 
	struct media_device *dev = devnode->media_dev;

	long ret;



	if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info)

	    || ioctl_info[_IOC_NR(cmd)].cmd != cmd)

		return -ENOIOCTLCMD;



	mutex_lock(&dev->graph_mutex);

	switch (cmd) {

	case MEDIA_IOC_DEVICE_INFO: