dmr/amdgpu: Fix crash on SRIOV for ERREVENT_ATHUB_INTERRUPT interrupt.

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Ignre the ERREVENT_ATHUB_INTERRUPT for systems without RAS.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
Reviewed-and-tested-by: Jack Zhang <Jack.Zhang1@xxxxxxx>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 84d8c33..cd84332 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1844,6 +1844,12 @@ int amdgpu_ras_fini(struct amdgpu_device *adev)
 
 void amdgpu_ras_global_ras_isr(struct amdgpu_device *adev)
 {
+	uint32_t hw_supported, supported;
+
+	amdgpu_ras_check_supported(adev, &hw_supported, &supported);
+	if (!hw_supported)
+		return;
+
 	if (atomic_cmpxchg(&amdgpu_ras_in_intr, 0, 1) == 0) {
 		DRM_WARN("RAS event of type ERREVENT_ATHUB_INTERRUPT detected!\n");
 
-- 
2.7.4

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