drm/amdgpu: Disable page faults while reading user wptrs

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These wptrs must be pinned and GPU accessible when this is called
from hqd_load functions. So they should never fault. This resolves
a circular lock dependency issue involving four locks including the
DQM lock and mmap_sem.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oak Zeng <Oak.Zeng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Felix Kuehling 2019-08-30 00:10:34 -04:00 • committed by Alex Deucher

parent 811bc15b49

commit cd05c86510

1 changed files with 8 additions and 0 deletions

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8

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

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