Preparation for refactoring media IOCTL handling to unify common parts.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/media-device.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 898a3cf..6d3ee5c 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -419,6 +419,20 @@ 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) */
+static struct {
+ unsigned int cmd;
+} media_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 +440,10 @@ static long media_device_ioctl(struct file *filp, unsigned int cmd,
struct media_device *dev = to_media_device(devnode);
long ret;
+ if (_IOC_NR(cmd) >= ARRAY_SIZE(media_ioctl_info)
+ || media_ioctl_info[_IOC_NR(cmd)].cmd != cmd)
+ return -ENOIOCTLCMD;
+
mutex_lock(&dev->graph_mutex);
switch (cmd) {
case MEDIA_IOC_DEVICE_INFO:
--
1.9.1
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