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drm/gem: drm_gem_dumb_map_offset(): reject dma-buf

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Reject mapping an imported dma-buf since is's an invalid use-case.

Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1502986891-36764-2-git-send-email-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes 2017-08-17 18:21:30 +02:00
parent b7df5749c2
commit 90378e5891
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/drm_gem.c
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@ -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;