drm/v3d: create a dedicated lock for dma fence #7112
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Don't mix dma fence lock with the active_job lock. Use fence_lock to protect the dma fence used by drm scheduler when signalling a job completion and queue_lock to protect concurrent access to active bin job in OOM and stats collection for a given file priv. The issue was uncovered when PREEMPT_RT on with a system freeze when opening multiple Chromium tabs on Raspberry Pi 5. Link: raspberrypi#7035 Fixes: fa6a20c ("drm/v3d: Address race-condition between per-fd GPU stats and fd release") Signed-off-by: Melissa Wen <[email protected]> Acked-by: Iago Toral Quiroga <[email protected]> Reviewed-by: Maíra Canal <[email protected]> Signed-off-by: Melissa Wen <[email protected]> Link: https://lore.kernel.org/r/[email protected]
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See: This is from upstream (and on 6.18.y branch). |
popcornmix
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See: raspberrypi/linux#7112 kernel: misc: ws2812-pio-rp1: Allow gamma to be disabled See: raspberrypi/linux#7110 kernel: Add AD799X ADC support See: raspberrypi/linux#7105
popcornmix
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See: raspberrypi/linux#7112 kernel: misc: ws2812-pio-rp1: Allow gamma to be disabled See: raspberrypi/linux#7110 kernel: Add AD799X ADC support See: raspberrypi/linux#7105
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drm/v3d: create a dedicated lock for dma fence
Don't mix dma fence lock with the active_job lock. Use fence_lock to
protect the dma fence used by drm scheduler when signalling a job
completion and queue_lock to protect concurrent access to active bin job
in OOM and stats collection for a given file priv. The issue was
uncovered when PREEMPT_RT on with a system freeze when opening multiple
Chromium tabs on Raspberry Pi 5.