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staging: ion: simplify ioctl args checking function 

Make arguments checking more easy to read.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Benjamin Gaignard 2017-10-23 17:55:36 +02:00 committed by Greg Kroah-Hartman
parent 198277f29d
commit fd1335936e
1 changed files with 5 additions and 6 deletions
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11
drivers/staging/android/ion/ion-ioctl.c
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@ -27,19 +27,18 @@ union ion_ioctl_arg {
static int validate_ioctl_arg(unsigned int cmd, union ion_ioctl_arg *arg)
{
int ret = 0;
switch (cmd) {
case ION_IOC_HEAP_QUERY:
ret = arg->query.reserved0 != 0;
ret |= arg->query.reserved1 != 0;
ret |= arg->query.reserved2 != 0;
if (arg->query.reserved0 ||
arg->query.reserved1 ||
arg->query.reserved2 )
return -EINVAL;
break;
default:
break;
}
return ret ? -EINVAL : 0;
return 0;
}
/* fix up the cases where the ioctl direction bits are incorrect */