mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-01 23:04:54 +01:00
Thomas Zimmermann
16fdb3cc6a
This reverts commit482c7e296e. The dma_buf field in struct drm_gem_object is not stable over the object instance's lifetime. The field becomes NULL when user space releases the final GEM handle on the buffer object. This resulted in a NULL-pointer deref. Workarounds in commit5307dce878("drm/gem: Acquire references on GEM handles for framebuffers") and commitf6bfc9afc7("drm/framebuffer: Acquire internal references on GEM handles") only solved the problem partially. They especially don't work for buffer objects without a DRM framebuffer associated. Hence, this revert to going back to using .import_attach->dmabuf. Signed-off-by: Thomas Zimmermann <[email protected]> Reviewed-by: Simona Vetter <[email protected]> Link: https://lore.kernel.org/r/[email protected]