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drm/amdgpu: avoid dereferencing a NULL pointer

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[ Upstream commit 55611b507f ]

Check if irq_src is NULL to avoid dereferencing a NULL pointer,
for MES ring is uneccessary to recieve an interrupt notification.

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-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:
Jack Xiao 2019-06-05 16:30:13 +08:00 committed by Greg Kroah-Hartman
parent 5e5bcbb108
commit 59d2736af3
1 changed files with 12 additions and 7 deletions
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19
drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
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@ -396,7 +396,9 @@ int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring,
ring->fence_drv.gpu_addr = adev->uvd.inst[ring->me].gpu_addr + index;
}
amdgpu_fence_write(ring, atomic_read(&ring->fence_drv.last_seq));
amdgpu_irq_get(adev, irq_src, irq_type);
if (irq_src)
amdgpu_irq_get(adev, irq_src, irq_type);
ring->fence_drv.irq_src = irq_src;
ring->fence_drv.irq_type = irq_type;
@ -508,8 +510,9 @@ void amdgpu_fence_driver_fini(struct amdgpu_device *adev)
/* no need to trigger GPU reset as we are unloading */
amdgpu_fence_driver_force_completion(ring);
}
amdgpu_irq_put(adev, ring->fence_drv.irq_src,
ring->fence_drv.irq_type);
if (ring->fence_drv.irq_src)
amdgpu_irq_put(adev, ring->fence_drv.irq_src,
ring->fence_drv.irq_type);
drm_sched_fini(&ring->sched);
del_timer_sync(&ring->fence_drv.fallback_timer);
for (j = 0; j <= ring->fence_drv.num_fences_mask; ++j)
@ -545,8 +548,9 @@ void amdgpu_fence_driver_suspend(struct amdgpu_device *adev)
}
/* disable the interrupt */
amdgpu_irq_put(adev, ring->fence_drv.irq_src,
ring->fence_drv.irq_type);
if (ring->fence_drv.irq_src)
amdgpu_irq_put(adev, ring->fence_drv.irq_src,
ring->fence_drv.irq_type);
}
}
@ -572,8 +576,9 @@ void amdgpu_fence_driver_resume(struct amdgpu_device *adev)
continue;
/* enable the interrupt */
amdgpu_irq_get(adev, ring->fence_drv.irq_src,
ring->fence_drv.irq_type);
if (ring->fence_drv.irq_src)
amdgpu_irq_get(adev, ring->fence_drv.irq_src,
ring->fence_drv.irq_type);
}
}