Reject mapping an imported dma-buf since is's an invalid use-case.
Cc: Philipp Zabel <p.za...@pengutronix.de>
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Cc: Sean Paul <seanp...@chromium.org>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Signed-off-by: Noralf Trønnes <nor...@tronnes.org>
---
drivers/gpu/drm/drm_gem.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index ad4e9cf..8da5801 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -333,6 +333,12 @@ int drm_gem_dumb_map_offset(struct drm_file *file, struct
drm_device *dev,
if (!obj)
return -ENOENT;
+ /* Don't allow imported objects to be mapped */
+ if (obj->import_attach) {
+ ret = -EINVAL;
+ goto out;
+ }
+
ret = drm_gem_create_mmap_offset(obj);
if (ret)
goto out;
--
2.7.4
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