drm/amdgpu: clear err_event_athub flag after reset exit

Otherwise next err_event_athub error cannot call gpu reset. And following
resume sequence will not be affected by this flag.

v2: create function to clear amdgpu_ras_in_intr for modularity of ras driver
Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -3887,6 +3887,9 @@ static int amdgpu_do_asic_reset(struct amdgpu_device *adev,
 		}
 	}
 
+	if (!r && amdgpu_ras_intr_triggered())
+		amdgpu_ras_intr_cleared();
+
 	list_for_each_entry(tmp_adev, device_list_handle, gmc.xgmi.head) {
 		if (need_full_reset) {
 			/* post card */

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h

@@ -621,6 +621,11 @@ static inline bool amdgpu_ras_intr_triggered(void)
 	return !!atomic_read(&amdgpu_ras_in_intr);
 }
 
+static inline void amdgpu_ras_intr_cleared(void)
+{
+	atomic_set(&amdgpu_ras_in_intr, 0);
+}
+
 void amdgpu_ras_global_ras_isr(struct amdgpu_device *adev);
 
 #endif