mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-27 12:57:53 +00:00
Code Issues Releases Wiki Activity

drm/amdgpu: Check the memory can be accesssed by ttm_device_clear_dma_mappings.

Browse source 
If the event guard is enabled and VF doesn't receive an ack from PF for full access,
the guest driver load crashes.
This is caused due to the call to ttm_device_clear_dma_mappings with non-initialized
mman during driver tear down.

This patch adds the necessary condition to check if the mman initialization passed or not
and takes the path based on the condition output.

Signed-off-by: Surbhi Kakarya <Surbhi.Kakarya@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Surbhi Kakarya 2021-12-17 12:01:09 -05:00 committed by Alex Deucher
parent f89c6bf734
commit b6fd6e0f5e
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View file

@ -3895,7 +3895,8 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
amdgpu_irq_fini_hw(adev);
ttm_device_clear_dma_mappings(&adev->mman.bdev);
if (adev->mman.initialized)
ttm_device_clear_dma_mappings(&adev->mman.bdev);
amdgpu_gart_dummy_page_fini(adev);