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

Arvind Yadav
2022-09-05T10:57:51Z

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(-)

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2.25.1