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authorDaniel Thompson <daniel.thompson@linaro.org>2015-12-22 19:36:44 -0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-02-09 09:25:12 +0100
commitbfe981a0952880df43d08a050bf3ae44aaebd795 (patch)
tree8c6e79fdb82c2ff71b4edb630ea93a24d850cd14 /include/uapi
parent10c1b6183a163aca59ba92b88f2b4c4cecd20d4c (diff)
downloadlinux-0-day-bfe981a0952880df43d08a050bf3ae44aaebd795.tar.gz
linux-0-day-bfe981a0952880df43d08a050bf3ae44aaebd795.tar.xz
drm: prime: Honour O_RDWR during prime-handle-to-fd
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
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/drm/drm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index b4e92eb120444..a0ebfe7c9a28c 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -669,6 +669,7 @@ struct drm_set_client_cap {
__u64 value;
};
+#define DRM_RDWR O_RDWR
#define DRM_CLOEXEC O_CLOEXEC
struct drm_prime_handle {
__u32 handle;