From: pding <Pixel.Ding@amd.com>
Date: Mon, 30 Oct 2017 14:07:24 +0800
Subject: drm/amdgpu: retry init if exclusive mode request is failed
Git-commit: 5ffa61c1bdc35895f60ef7b553b43266d3fda469
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

This is caused of that hypervisor fails to handle request, one known
issue is MMIO unblocking timeout. In theory we can retry init here.

Signed-off-by: pding <Pixel.Ding@amd.com>
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1625,7 +1625,7 @@ static int amdgpu_early_init(struct amdg
 	if (amdgpu_sriov_vf(adev)) {
 		r = amdgpu_virt_request_full_gpu(adev, true);
 		if (r)
-			return r;
+			return -EAGAIN;
 	}
 
 	for (i = 0; i < adev->num_ip_blocks; i++) {