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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2016-05-04 00:35:12 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-09-22 16:23:04 +0300 |
| commit | 6975264c4c6c00c88099b8927bac52838507cea9 (patch) | |
| tree | 0c7662f400dfafe71974b170d7f65f22aea4bf31 /drivers/media/media-device.c | |
| parent | cf439d5f4d609b296cabf9a896fcf571b57e260b (diff) | |
| download | linux-6975264c4c6c00c88099b8927bac52838507cea9.tar.xz | |
[media] media: Unify IOCTL handler calling
Each IOCTL handler can be listed in an array instead of using a large and
cumbersome switch. Do that.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/media-device.c')
| -rw-r--r-- | drivers/media/media-device.c | 51 |
1 files changed, 15 insertions, 36 deletions
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c index f3212640858b..4ac912b60f85 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -419,20 +419,24 @@ 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 } +#define MEDIA_IOC(__cmd, func) \ + [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ + .cmd = MEDIA_IOC_##__cmd, \ + .fn = (long (*)(struct media_device *, void __user *))func, \ + } /* the table is indexed by _IOC_NR(cmd) */ struct media_ioctl_info { unsigned int cmd; + long (*fn)(struct media_device *dev, void __user *arg); }; 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), + MEDIA_IOC(DEVICE_INFO, media_device_get_info), + MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities), + MEDIA_IOC(ENUM_LINKS, media_device_enum_links), + MEDIA_IOC(SETUP_LINK, media_device_setup_link), + MEDIA_IOC(G_TOPOLOGY, media_device_get_topology), }; static long media_device_ioctl(struct file *filp, unsigned int cmd, @@ -440,42 +444,17 @@ static long media_device_ioctl(struct file *filp, unsigned int cmd, { struct media_devnode *devnode = media_devnode_data(filp); struct media_device *dev = devnode->media_dev; + const struct media_ioctl_info *info; 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: - ret = media_device_get_info(dev, - (struct media_device_info __user *)arg); - break; - - case MEDIA_IOC_ENUM_ENTITIES: - ret = media_device_enum_entities(dev, - (struct media_entity_desc __user *)arg); - break; - - case MEDIA_IOC_ENUM_LINKS: - ret = media_device_enum_links(dev, - (struct media_links_enum __user *)arg); - break; + info = &ioctl_info[_IOC_NR(cmd)]; - case MEDIA_IOC_SETUP_LINK: - ret = media_device_setup_link(dev, - (struct media_link_desc __user *)arg); - break; - - case MEDIA_IOC_G_TOPOLOGY: - ret = media_device_get_topology(dev, - (struct media_v2_topology __user *)arg); - break; - - default: - ret = -ENOIOCTLCMD; - } + mutex_lock(&dev->graph_mutex); + ret = info->fn(dev, (void __user *)arg); mutex_unlock(&dev->graph_mutex); return ret; |