drm/amdgpu: pull ras controller int status only when ras enabled

ras_controller_irq and athub_err_event_irq are only registered
when PCIE_BIF ras is marked as supported. as the result, the driver
also just need pull the int status in such case.

Signed-off-by: Hawking Zhang <[e-mail]>
Reviewed-by: John Clements <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c

···
 #include "amdgpu_connectors.h"
 #include "amdgpu_trace.h"
 #include "amdgpu_amdkfd.h"
+#include "amdgpu_ras.h"
 
 #include <linux/pm_runtime.h>
 
···
 	 * register to check whether the interrupt is triggered or not, and properly
 	 * ack the interrupt if it is there
 	 */
-	if (adev->nbio.funcs &&
-	    adev->nbio.funcs->handle_ras_controller_intr_no_bifring)
-		adev->nbio.funcs->handle_ras_controller_intr_no_bifring(adev);
+	if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__PCIE_BIF)) {
+		if (adev->nbio.funcs &&
+		    adev->nbio.funcs->handle_ras_controller_intr_no_bifring)
+			adev->nbio.funcs->handle_ras_controller_intr_no_bifring(adev);
 
-	if (adev->nbio.funcs &&
-	    adev->nbio.funcs->handle_ras_err_event_athub_intr_no_bifring)
-		adev->nbio.funcs->handle_ras_err_event_athub_intr_no_bifring(adev);
+		if (adev->nbio.funcs &&
+		    adev->nbio.funcs->handle_ras_err_event_athub_intr_no_bifring)
+			adev->nbio.funcs->handle_ras_err_event_athub_intr_no_bifring(adev);
+	}
 
 	return ret;
 }