diff options
Diffstat (limited to 'drivers/gpu/drm/drm_prime.c')
| -rw-r--r-- | drivers/gpu/drm/drm_prime.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index f924b8b4ab6b..d29dafce9bb0 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -285,7 +285,7 @@ EXPORT_SYMBOL(drm_gem_dmabuf_release); /** * drm_gem_prime_fd_to_handle - PRIME import function for GEM drivers - * @dev: dev to export the buffer from + * @dev: drm_device to import into * @file_priv: drm file-private structure * @prime_fd: fd id of the dma-buf which should be imported * @handle: pointer to storage for the handle of the imported buffer object @@ -544,7 +544,8 @@ int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data, * Optional pinning of buffers is handled at dma-buf attach and detach time in * drm_gem_map_attach() and drm_gem_map_detach(). Backing storage itself is * handled by drm_gem_map_dma_buf() and drm_gem_unmap_dma_buf(), which relies on - * &drm_gem_object_funcs.get_sg_table. + * &drm_gem_object_funcs.get_sg_table. If &drm_gem_object_funcs.get_sg_table is + * unimplemented, exports into another device are rejected. * * For kernel-internal access there's drm_gem_dmabuf_vmap() and * drm_gem_dmabuf_vunmap(). Userspace mmap support is provided by @@ -583,6 +584,9 @@ int drm_gem_map_attach(struct dma_buf *dma_buf, { struct drm_gem_object *obj = dma_buf->priv; + if (!obj->funcs->get_sg_table) + return -ENOSYS; + return drm_gem_pin(obj); } EXPORT_SYMBOL(drm_gem_map_attach); @@ -925,7 +929,7 @@ struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev, obj = dma_buf->priv; if (obj->dev == dev) { /* - * Importing dmabuf exported from out own gem increases + * Importing dmabuf exported from our own gem increases * refcount on gem itself instead of f_count of dmabuf. */ drm_gem_object_get(obj); |