From b6fd6e0f5eb8c6d10575d08a2c6df8ed83877e07 Mon Sep 17 00:00:00 2001 From: Surbhi Kakarya Date: Fri, 17 Dec 2021 12:01:09 -0500 Subject: drm/amdgpu: Check the memory can be accesssed by ttm_device_clear_dma_mappings. 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 Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 43e9149e129a..dadfa03570d1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -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); -- cgit v1.2.3-59-g8ed1b