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drm/amdgpu: Fix tracking of invalid userptrs

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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>
This commit is contained in:
Felix Kuehling 2019-06-29 01:50:35 -04:00 committed by Alex Deucher
parent e7e2505326
commit f4fd28b6c7
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
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@ -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;