From: pding <Pixel.Ding@amd.com>
Date: Mon, 30 Oct 2017 06:07:24 +0000 (+0800)
Subject: drm/amdgpu: retry init if exclusive mode request is failed
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5ffa61c1bdc35895f60ef7b553b43266d3fda469;p=linux.git

drm/amdgpu: retry init if exclusive mode request is failed

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>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 7af0d5d8cb1df..69e724c96442b 100644
--- 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 amdgpu_device *adev)
 	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++) {