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

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Date:   Mon, 5 Sep 2022 16:26:49 +0530
From:   Arvind Yadav <Arvind.Yadav@....com>
To:     <Christian.Koenig@....com>, <andrey.grodzovsky@....com>,
        <shashank.sharma@....com>, <amaranath.somalapuram@....com>,
        <Arunpravin.PaneerSelvam@....com>, <sumit.semwal@...aro.org>,
        <gustavo@...ovan.org>, <airlied@...ux.ie>, <daniel@...ll.ch>,
        <linux-media@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <linaro-mm-sig@...ts.linaro.org>, <linux-kernel@...r.kernel.org>
CC:     Arvind Yadav <Arvind.Yadav@....com>
Subject: [PATCH 0/4] dma-buf: To check enable signaling before signaled

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):
  dma-buf: Check status of enable-signaling bit on debug
  drm/sched: Add callback and enable signaling on debug
  dma-buf: Add callback and enable signaling on debug
  dma-buf: Add callback and enable signaling on debug

 drivers/dma-buf/dma-fence.c             | 17 ++++++++
 drivers/dma-buf/st-dma-fence-chain.c    | 17 ++++++++
 drivers/dma-buf/st-dma-fence-unwrap.c   | 54 +++++++++++++++++++++++++
 drivers/dma-buf/st-dma-fence.c          | 34 +++++++++++++++-
 drivers/dma-buf/st-dma-resv.c           | 30 ++++++++++++++
 drivers/gpu/drm/scheduler/sched_fence.c | 12 ++++++
 drivers/gpu/drm/scheduler/sched_main.c  |  4 +-
 include/linux/dma-fence.h               |  5 +++
 8 files changed, 171 insertions(+), 2 deletions(-)

-- 
2.25.1