Commit f4fd28b6 authored Jun 29, 2019 by Felix Kuehling Committed by Alex Deucher Jul 03, 2019

drm/amdgpu: Fix tracking of invalid userptrs



Restore the code that resets mem->invalid. Othewise so mapping
userptrs after they got an MMU notifiers would always be skipped.

This also avoids unnecessarily calling get_user_pages on BOs that
have not been invalidated since the last try.

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

parent e7e25053

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

+6 −0

Original line number	Diff line number	Diff line
		@@ -1740,6 +1740,12 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info,
		}

		amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm);

		/* Mark the BO as valid unless it was invalidated
		* again concurrently.
		*/
		if (atomic_cmpxchg(&mem->invalid, invalid, 0) != invalid)
		return -EAGAIN;
		}

		return 0;

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