switch compat_drm_getmap() to drm_ioctl_kernel()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
index da2377cd86c2a21a06ba5fa500eff009538e496f..1d067f59952d98ffb1133b0f660e450749ac543f 100644 (file)
--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -166,32 +166,23 @@ static int compat_drm_getmap(struct file *file, unsigned int cmd,
 {
        drm_map32_t __user *argp = (void __user *)arg;
        drm_map32_t m32;
-       struct drm_map __user *map;
-       int idx, err;
-       void *handle;
-
-       if (get_user(idx, &argp->offset))
-               return -EFAULT;
+       struct drm_map map;
+       int err;
 
-       map = compat_alloc_user_space(sizeof(*map));
-       if (!map)
-               return -EFAULT;
-       if (__put_user(idx, &map->offset))
+       if (copy_from_user(&m32, argp, sizeof(m32)))
                return -EFAULT;
 
-       err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
+       map.offset = m32.offset;
+       err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
        if (err)
                return err;
 
-       if (__get_user(m32.offset, &map->offset)
-           || __get_user(m32.size, &map->size)
-           || __get_user(m32.type, &map->type)
-           || __get_user(m32.flags, &map->flags)
-           || __get_user(handle, &map->handle)
-           || __get_user(m32.mtrr, &map->mtrr))
-               return -EFAULT;
-
-       m32.handle = (unsigned long)handle;
+       m32.offset = map.offset;
+       m32.size = map.size;
+       m32.type = map.type;
+       m32.flags = map.flags;
+       m32.handle = ptr_to_compat(map.handle);
+       m32.mtrr = map.mtrr;
        if (copy_to_user(argp, &m32, sizeof(m32)))
                return -EFAULT;
        return 0;
@@ -1055,7 +1046,7 @@ static struct {
 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
        DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
        DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
-       [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)].fn = compat_drm_getmap,
+       DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
        [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)].fn = compat_drm_getclient,
        [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)].fn = compat_drm_getstats,
        DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),