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drm/amdgpu: Check if NBIO funcs are NULL in amdgpu_device_baco_exit

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[ Upstream commit 0cdb3f9740 ]

The special case for VM passthrough doesn't check adev->nbio.funcs
before dereferencing it. If GPUs that don't have an NBIO block are
passed through, this leads to a NULL pointer dereference on startup.

Signed-off-by: Friedrich Vock <friedrich.vock@gmx.de>
Fixes: 1bece222ea ("drm/amdgpu: Clear doorbell interrupt status for Sienna Cichlid")
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Friedrich Vock 2024-05-14 09:06:38 +02:00 committed by Greg Kroah-Hartman
parent ae1dd0a379
commit 67b4592a7d
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -5645,7 +5645,7 @@ int amdgpu_device_baco_exit(struct drm_device *dev)
adev->nbio.funcs->enable_doorbell_interrupt)
adev->nbio.funcs->enable_doorbell_interrupt(adev, true);
if (amdgpu_passthrough(adev) &&
if (amdgpu_passthrough(adev) && adev->nbio.funcs &&
adev->nbio.funcs->clear_doorbell_interrupt)
adev->nbio.funcs->clear_doorbell_interrupt(adev);