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ed55942044
Currently DRM_IOCTL_PRIME_HANDLE_TO_FD rejects all flags except (DRM|O)_CLOEXEC making it difficult (maybe impossible) for userspace to mmap() the resulting dma-buf even when this is supported by the DRM driver. It is trivial to relax the restriction and permit read/write access. This is safe because the flags are seldom touched by drm; mostly they are passed verbatim to dma_buf calls. v3 (Tiago): removed unused flags variable from drm_prime_handle_to_fd_ioctl. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com> Reviewed-by: Stéphane Marchesin <marcheu@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1450820214-12509-2-git-send-email-tiago.vignatti@intel.com (cherry picked from commit bfe981a0952880df43d08a050bf3ae44aaebd795) Signed-off-by: Brian Norris <briannorris@chromium.org> Change-Id: Ieb3c547b1a08bd9c90fe72e0a1df1757d100aa8e Reviewed-on: https://chrome-internal-review.googlesource.com/255266 Tested-by: Brian Norris <briannorris@google.com> Reviewed-by: Doug Anderson <dianders@google.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com>