The client buffer's framebuffer holds a reference and pointer on each of its GEM buffer objects. Thus the field gem in the client- buffer struct is not necessary. Deprecated the field and convert the client-buffer helpers to use the framebuffer's objects.
In drm_client_buffer_delete(), do a possible vunmap before releasing the framebuffer. Otherwise we'd eventually release the framebuffer before unmaping its buffer objects. v2: - avoid dependency on CONFIG_DRM_KMS_HELPER Signed-off-by: Thomas Zimmermann <[email protected]> Reviewed-by: Jocelyn Falempe <[email protected]> --- drivers/gpu/drm/drm_client.c | 20 ++++++++++++-------- include/drm/drm_client.h | 9 +++------ 2 files changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index c4db4fc7ba69..0aa56c4b912b 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -17,6 +17,7 @@ #include <drm/drm_fourcc.h> #include <drm/drm_framebuffer.h> #include <drm/drm_gem.h> +#include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_mode.h> #include <drm/drm_print.h> @@ -178,17 +179,17 @@ EXPORT_SYMBOL(drm_client_release); static void drm_client_buffer_delete(struct drm_client_buffer *buffer) { + struct drm_gem_object *gem = buffer->fb->obj[0]; int ret; + drm_gem_vunmap(gem, &buffer->map); + ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file); if (ret) drm_err(buffer->client->dev, "Error removing FB:%u (%d)\n", buffer->fb->base.id, ret); - if (buffer->gem) { - drm_gem_vunmap(buffer->gem, &buffer->map); - drm_gem_object_put(buffer->gem); - } + drm_gem_object_put(buffer->gem); kfree(buffer); } @@ -278,7 +279,7 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, int drm_client_buffer_vmap_local(struct drm_client_buffer *buffer, struct iosys_map *map_copy) { - struct drm_gem_object *gem = buffer->gem; + struct drm_gem_object *gem = buffer->fb->obj[0]; struct iosys_map *map = &buffer->map; int ret; @@ -307,7 +308,7 @@ EXPORT_SYMBOL(drm_client_buffer_vmap_local); */ void drm_client_buffer_vunmap_local(struct drm_client_buffer *buffer) { - struct drm_gem_object *gem = buffer->gem; + struct drm_gem_object *gem = buffer->fb->obj[0]; struct iosys_map *map = &buffer->map; drm_gem_vunmap_locked(gem, map); @@ -338,9 +339,10 @@ EXPORT_SYMBOL(drm_client_buffer_vunmap_local); int drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct iosys_map *map_copy) { + struct drm_gem_object *gem = buffer->fb->obj[0]; int ret; - ret = drm_gem_vmap(buffer->gem, &buffer->map); + ret = drm_gem_vmap(gem, &buffer->map); if (ret) return ret; *map_copy = buffer->map; @@ -359,7 +361,9 @@ EXPORT_SYMBOL(drm_client_buffer_vmap); */ void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) { - drm_gem_vunmap(buffer->gem, &buffer->map); + struct drm_gem_object *gem = buffer->fb->obj[0]; + + drm_gem_vunmap(gem, &buffer->map); } EXPORT_SYMBOL(drm_client_buffer_vunmap); diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h index c674464f7e74..b01fc2a21f09 100644 --- a/include/drm/drm_client.h +++ b/include/drm/drm_client.h @@ -176,12 +176,9 @@ struct drm_client_buffer { /** * @gem: GEM object backing this buffer * - * FIXME: The dependency on GEM here isn't required, we could - * convert the driver handle to a dma-buf instead and use the - * backend-agnostic dma-buf vmap support instead. This would - * require that the handle2fd prime ioctl is reworked to pull the - * fd_install step out of the driver backend hooks, to make that - * final step optional for internal users. + * FIXME: The DRM framebuffer holds a reference on its GEM + * buffer objects. Do not use this field in new code and + * update existing users. */ struct drm_gem_object *gem; -- 2.51.1
