[PATCH v2 0/4] dma-buf: To check enable signaling before signaled

From: Arvind Yadav <Arvind.Yadav@amd.com>
To: <Christian.Koenig@amd.com>, <andrey.grodzovsky@amd.com>,
	<shashank.sharma@amd.com>, <amaranath.somalapuram@amd.com>,
	<Arunpravin.PaneerSelvam@amd.com>, <sumit.semwal@linaro.org>,
	<gustavo@padovan.org>, <airlied@linux.ie>, <daniel@ffwll.ch>,
	<linux-media@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	<linaro-mm-sig@lists.linaro.org>, <linux-kernel@vger.kernel.org>
Cc: Arvind Yadav <Arvind.Yadav@amd.com>
Subject: [PATCH v2 0/4] dma-buf: To check enable signaling before signaled
Date: Mon, 5 Sep 2022 22:04:58 +0530	[thread overview]
Message-ID: <20220905163502.4032-1-Arvind.Yadav@amd.com> (raw)

TTM, GEM, DRM or the core DMA-buf framework are needs
to enable software signaling before the fence is signaled.
The core DMA-buf framework software can forget to call
enable_signaling before the fence is signaled. It means
framework code can forget to call dma_fence_enable_sw_signaling()
before calling dma_fence_is_signaled(). To avoid this scenario
on debug kernel, check the DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT bit
status before checking the MA_FENCE_FLAG_SIGNALED_BIT bit status
to confirm that software signaling is enabled.

Arvind Yadav (4):
  [PATCH v2 1/4] drm/sched: Enable signaling for finished fence
  [PATCH v2 2/4] dma-buf: enable signaling for the stub fence on debug
  [PATCH v2 3/4] dma-buf: enable signaling for selftest fence on debug
  [PATCH v2 4/4] dma-buf: Check status of enable-signaling bit on debug

 drivers/dma-buf/dma-fence.c            |  7 ++++
 drivers/dma-buf/st-dma-fence-chain.c   |  8 +++++
 drivers/dma-buf/st-dma-fence-unwrap.c  | 44 ++++++++++++++++++++++++++
 drivers/dma-buf/st-dma-fence.c         | 25 ++++++++++++++-
 drivers/dma-buf/st-dma-resv.c          | 20 ++++++++++++
 drivers/gpu/drm/scheduler/sched_main.c |  2 ++
 include/linux/dma-fence.h              |  5 +++
 7 files changed, 110 insertions(+), 1 deletion(-)

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2.25.1