Commit 7d4d269c authored by Thomas Zimmermann's avatar Thomas Zimmermann
Browse files

drm/fb-helper: Copy dma-buf map before flushing shadow fb 



Copy the vmap()'ed instance of struct dma_buf_map before modifying it,
in case the implementation of vunmap() depends on the exact address.

Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Acked-by: default avatarMaxime Ripard <mripard@kernel.org>
Acked-by: default avatarSam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201120102545.4047-10-tzimmermann@suse.de
parent 4270d6f6

drivers/gpu/drm/drm_fb_helper.c

+3 −2
Original line number Diff line number Diff line
@@ -395,14 +395,15 @@ static int drm_fb_helper_damage_blit(struct drm_fb_helper *fb_helper, 
				     struct drm_clip_rect *clip)

{

	struct drm_client_buffer *buffer = fb_helper->buffer;

	struct dma_buf_map map;

	struct dma_buf_map map, dst;

	int ret;



	ret = drm_client_buffer_vmap(buffer, &map);

	if (ret)

		return ret;



	drm_fb_helper_damage_blit_real(fb_helper, clip, &map);

	dst = map;

	drm_fb_helper_damage_blit_real(fb_helper, clip, &dst);



	drm_client_buffer_vunmap(buffer);

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