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Diffstat (limited to 'drivers/gpu/drm/drm_bufs.c')
| -rw-r--r-- | drivers/gpu/drm/drm_bufs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index 0190fce20078..5a4dbb410b71 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -414,6 +414,15 @@ int drm_addmap_ioctl(struct drm_device *dev, void *data, /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ map->handle = (void *)(unsigned long)maplist->user_token; + + /* + * It appears that there are no users of this value whatsoever -- + * drmAddMap just discards it. Let's not encourage its use. + * (Keeping drm_addmap_core's returned mtrr value would be wrong -- + * it's not a real mtrr index anymore.) + */ + map->mtrr = -1; + return 0; } |