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[media] media: Add 64--32 bit compat ioctl handler

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Provide an ioctl handler for 32-bit binaries on 64-bit systems.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sakari Ailus 2013-01-22 12:27:55 -03:00 • committed by Mauro Carvalho Chehab
commit c6c1d50b51
2 changed files with 29 additions and 3 deletions
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31
drivers/media/media-devnode.c
View file

@ -116,19 +116,41 @@ static unsigned int media_poll(struct file *filp,
return mdev->fops->poll(filp, poll);
}
static long media_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
static long
__media_ioctl(struct file *filp, unsigned int cmd, unsigned long arg,
long (*ioctl_func)(struct file *filp, unsigned int cmd,
unsigned long arg))
{
struct media_devnode *mdev = media_devnode_data(filp);
if (!mdev->fops->ioctl)
if (!ioctl_func)
return -ENOTTY;
if (!media_devnode_is_registered(mdev))
return -EIO;
return mdev->fops->ioctl(filp, cmd, arg);
return ioctl_func(filp, cmd, arg);
}
static long media_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct media_devnode *mdev = media_devnode_data(filp);
return __media_ioctl(filp, cmd, arg, mdev->fops->ioctl);
}
#ifdef CONFIG_COMPAT
static long media_compat_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct media_devnode *mdev = media_devnode_data(filp);
return __media_ioctl(filp, cmd, arg, mdev->fops->compat_ioctl);
}
#endif /* CONFIG_COMPAT */
/* Override for the open function */
static int media_open(struct inode *inode, struct file *filp)
{
@ -188,6 +210,9 @@ static const struct file_operations media_devnode_fops = {
.write = media_write,
.open = media_open,
.unlocked_ioctl = media_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = media_compat_ioctl,
#endif /* CONFIG_COMPAT */
.release = media_release,
.poll = media_poll,
.llseek = no_llseek,

1
include/media/media-devnode.h
View file

@ -46,6 +46,7 @@ struct media_file_operations {
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
long (*ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*open) (struct file *);
int (*release) (struct file *);
};