[PATCH] drm/amdgpu: not to save bo in the case of RAS err_event_athub

[David (Ming Qiang) Wu]

err_event_athub will corrupt VCPU buffer and not good to
be restored in amdgpu_vcn_resume() and in this case
the VCPU buffer needs to be cleared for VCN firmware to
work properly.

Signed-off-by: David (Ming Qiang) Wu <David.Wu3 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
index c93f3a4c0e31..f4963330c772 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
@@ -294,8 +294,15 @@ int amdgpu_vcn_suspend(struct amdgpu_device *adev)
 	void *ptr;
 	int i, idx;
 
+	bool in_ras_intr = amdgpu_ras_intr_triggered();
+
 	cancel_delayed_work_sync(&adev->vcn.idle_work);
 
+	/* err_event_athub will corrupt VCPU buffer, so we need to
+	 * restore fw data and clear buffer in amdgpu_vcn_resume() */
+	if (in_ras_intr)
+		return 0;
+
 	for (i = 0; i < adev->vcn.num_vcn_inst; ++i) {
 		if (adev->vcn.harvest_config & (1 << i))
 			continue;
-- 
2.34.1