This is a note to let you know that I've just added the patch titled

drm/radeon: Fail fb creation from imported dma-bufs.

to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: drm-radeon-fail-fb-creation-from-imported-dma-bufs.patch and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Mar 19 10:11:52 CET 2018

From: Christopher James Halse Rogers christopher.halse.rogers@canonical.com Date: Wed, 29 Mar 2017 15:00:54 +1100 Subject: drm/radeon: Fail fb creation from imported dma-bufs.

From: Christopher James Halse Rogers christopher.halse.rogers@canonical.com

[ Upstream commit a294043b2fbd8de69d161457ed0c7a4026bbfa5a ]

Any use of the framebuffer will migrate it to VRAM, which is not sensible for an imported dma-buf.

v2: Use DRM_DEBUG_KMS to prevent userspace accidentally spamming dmesg.

Reviewed-by: Michel Dänzer michel.daenzer@amd.com Reviewed-by: Christian König christian.koenig@amd.com Signed-off-by: Christopher James Halse Rogers christopher.halse.rogers@canonical.com CC: amd-gfx@lists.freedesktop.org Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/radeon/radeon_display.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -1320,6 +1320,12 @@ radeon_user_framebuffer_create(struct dr return ERR_PTR(-ENOENT); }

+ /* Handle is imported dma-buf, so cannot be migrated to VRAM for scanout */ + if (obj->import_attach) { + DRM_DEBUG_KMS("Cannot create framebuffer from imported dma_buf\n"); + return ERR_PTR(-EINVAL); + } + radeon_fb = kzalloc(sizeof(*radeon_fb), GFP_KERNEL); if (radeon_fb == NULL) { drm_gem_object_unreference_unlocked(obj);

Patches currently in stable-queue which might be from christopher.halse.rogers@canonical.com are

queue-3.18/drm-radeon-fail-fb-creation-from-imported-dma-bufs.patch