drm/amdgpu: add codes to capture invalid hardware access when recovery

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When recovery thread has begun GPU reset, there should be not other
threads to access hardware, otherwise system randomly hang.

v2 (chk): rewritten from scratch, use trylock and lockdep instead of
hand wiring the logic.

v3: add in_irq check

v4: change to check in_task

Signed-off-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Dennis Li 2021-03-10 17:20:45 +08:00 • committed by Alex Deucher

parent c103b85072

commit 56b53c0b5a

3 changed files with 42 additions and 11 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu.h

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47

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

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4

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c

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