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switch compat_drm_addmap() to drm_ioctl_kernel() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-05-24 19:27:36 -04:00
parent 8547ee9d44
commit b36180a33b
1 changed files with 13 additions and 20 deletions
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33
drivers/gpu/drm/drm_ioc32.c
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@ -194,35 +194,28 @@ static int compat_drm_addmap(struct file *file, unsigned int cmd,
{
drm_map32_t __user *argp = (void __user *)arg;
drm_map32_t m32;
struct drm_map __user *map;
struct drm_map map;
int err;
void *handle;
if (copy_from_user(&m32, argp, sizeof(m32)))
return -EFAULT;
map = compat_alloc_user_space(sizeof(*map));
if (!map)
return -EFAULT;
if (__put_user(m32.offset, &map->offset)
|| __put_user(m32.size, &map->size)
|| __put_user(m32.type, &map->type)
|| __put_user(m32.flags, &map->flags))
return -EFAULT;
map.offset = m32.offset;
map.size = m32.size;
map.type = m32.type;
map.flags = m32.flags;
err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
if (err)
return err;
if (__get_user(m32.offset, &map->offset)
|| __get_user(m32.mtrr, &map->mtrr)
|| __get_user(handle, &map->handle))
return -EFAULT;
m32.handle = (unsigned long)handle;
if (m32.handle != (unsigned long)handle)
m32.offset = map.offset;
m32.mtrr = map.mtrr;
m32.handle = ptr_to_compat(map.handle);
if (map.handle != compat_ptr(m32.handle))
pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
handle, m32.type, m32.offset);
map.handle, m32.type, m32.offset);
if (copy_to_user(argp, &m32, sizeof(m32)))
return -EFAULT;
@ -1021,7 +1014,7 @@ static struct {
DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)].fn = compat_drm_addmap,
DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)].fn = compat_drm_markbufs,
DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),