From: xinhui pan <xinhui.pan@amd.com>
Date: Wed, 8 May 2019 14:32:34 +0000 (+0800)
Subject: drm/amdgpu: gmc support ras gpu reset
X-Git-Tag: microblaze-v5.4-rc1~229^2~28^2~125
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=36810fdb69ba35d8d8d7407b79c522218e8a0dd5;p=linux-2.6-microblaze.git

drm/amdgpu: gmc support ras gpu reset

request a gpu reset if ras return EAGAIN.
we will run late init again so it is ok to do nothing this time.

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 3fd79e07944d..19f7cc1d51c3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -696,8 +696,14 @@ static int gmc_v9_0_ecc_late_init(void *handle)
 	**ras_if = ras_block;
 
 	r = amdgpu_ras_feature_enable_on_boot(adev, *ras_if, 1);
-	if (r)
+	if (r) {
+		if (r == -EAGAIN) {
+			amdgpu_ras_request_reset_on_boot(adev,
+					AMDGPU_RAS_BLOCK__UMC);
+			r = 0;
+		}
 		goto feature;
+	}
 
 	ih_info.head = **ras_if;
 	fs_info.head = **ras_if;
@@ -730,7 +736,7 @@ interrupt:
 feature:
 	kfree(*ras_if);
 	*ras_if = NULL;
-	return -EINVAL;
+	return r;
 }