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

drm/vc4: Release fence after signalling

to the 4.14-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-vc4-release-fence-after-signalling.patch and it can be found in the queue-4.14 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 Fri Feb 23 11:45:09 CET 2018

From: Stefan Schake stschake@gmail.com Date: Sat, 2 Dec 2017 18:40:39 +0100 Subject: drm/vc4: Release fence after signalling

From: Stefan Schake stschake@gmail.com

[ Upstream commit babc8110057cb9ca542c3c1666cbda4e8ccf9250 ]

We were never releasing the initial fence reference that is obtained through dma_fence_init.

Link: https://github.com/anholt/linux/issues/122 Fixes: cdec4d361323 ("drm/vc4: Expose dma-buf fences for V3D rendering.") Signed-off-by: Stefan Schake stschake@gmail.com Signed-off-by: Eric Anholt eric@anholt.net Reviewed-by: Eric Anholt eric@anholt.net Link: https://patchwork.freedesktop.org/patch/msgid/1512236444-301-1-git-send-emai... Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/vc4/vc4_gem.c | 4 +++- drivers/gpu/drm/vc4/vc4_irq.c | 1 + 2 files changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_gem.c +++ b/drivers/gpu/drm/vc4/vc4_gem.c @@ -829,8 +829,10 @@ vc4_complete_exec(struct drm_device *dev /* If we got force-completed because of GPU reset rather than * through our IRQ handler, signal the fence now. */ - if (exec->fence) + if (exec->fence) { dma_fence_signal(exec->fence); + dma_fence_put(exec->fence); + }

if (exec->bo) { for (i = 0; i < exec->bo_count; i++) --- a/drivers/gpu/drm/vc4/vc4_irq.c +++ b/drivers/gpu/drm/vc4/vc4_irq.c @@ -139,6 +139,7 @@ vc4_irq_finish_render_job(struct drm_dev list_move_tail(&exec->head, &vc4->job_done_list); if (exec->fence) { dma_fence_signal_locked(exec->fence); + dma_fence_put(exec->fence); exec->fence = NULL; } vc4_submit_next_render_job(dev);

Patches currently in stable-queue which might be from stschake@gmail.com are

queue-4.14/drm-vc4-release-fence-after-signalling.patch