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media: dvb: fix compat ioctl translation 

The VIDEO_GET_EVENT and VIDEO_STILLPICTURE was added back in 2005 but
it never worked because the command number is wrong.

Using the right command number means we have a better chance of them
actually doing the right thing, though clearly nobody has ever tried
it successfully.

I noticed these while auditing the remaining users of compat_time_t
for y2038 bugs. This one is fine in that regard, it just never did
anything.

Fixes: 6e87abd0b8 ("[DVB]: Add compat ioctl handling.")

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Arnd Bergmann 2018-08-27 15:56:21 -04:00 committed by Mauro Carvalho Chehab
parent d9d9447991
commit 1ccbeeb888
1 changed files with 6 additions and 4 deletions
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10
fs/compat_ioctl.c
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@ -141,6 +141,7 @@ struct compat_video_event {
unsigned int frame_rate;
} u;
};
#define VIDEO_GET_EVENT32 _IOR('o', 28, struct compat_video_event)
static int do_video_get_event(struct file *file,
unsigned int cmd, struct compat_video_event __user *up)
@ -152,7 +153,7 @@ static int do_video_get_event(struct file *file,
if (kevent == NULL)
return -EFAULT;
err = do_ioctl(file, cmd, (unsigned long)kevent);
err = do_ioctl(file, VIDEO_GET_EVENT, (unsigned long)kevent);
if (!err) {
err = convert_in_user(&kevent->type, &up->type);
err |= convert_in_user(&kevent->timestamp, &up->timestamp);
@ -171,6 +172,7 @@ struct compat_video_still_picture {
compat_uptr_t iFrame;
int32_t size;
};
#define VIDEO_STILLPICTURE32 _IOW('o', 30, struct compat_video_still_picture)
static int do_video_stillpicture(struct file *file,
unsigned int cmd, struct compat_video_still_picture __user *up)
@ -193,7 +195,7 @@ static int do_video_stillpicture(struct file *file,
if (err)
return -EFAULT;
err = do_ioctl(file, cmd, (unsigned long) up_native);
err = do_ioctl(file, VIDEO_STILLPICTURE, (unsigned long) up_native);
return err;
}
@ -1305,9 +1307,9 @@ static long do_ioctl_trans(unsigned int cmd,
return rtc_ioctl(file, cmd, argp);
/* dvb */
case VIDEO_GET_EVENT:
case VIDEO_GET_EVENT32:
return do_video_get_event(file, cmd, argp);
case VIDEO_STILLPICTURE:
case VIDEO_STILLPICTURE32:
return do_video_stillpicture(file, cmd, argp);
}