On Thu, Dec 16, 2021 at 10:25 AM Surbhi Kakarya <surbhi.kakarya@xxxxxxx> wrote: > > 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: skakarya <Surbhi.Kakarya@xxxxxxx> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> > Change-Id: I1c18c7eb3500687c8b6e7fc414503dcf2a20b94c > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c > index 598250a380f5..226110be7a2f 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c > @@ -3984,7 +3984,8 @@ 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); > > -- > 2.25.1 >
