[PATCH 2/2] drm/amdgpu: retry init if exclusive mode request is failed

Yu, Xiangliang Xiangliang.Yu at amd.com
Tue Oct 31 08:18:07 UTC 2017

RB-by: Xiangliang Yu <Xiangliang.Yu at amd.com>

-----Original Message-----
From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of Pixel Ding
Sent: Tuesday, October 31, 2017 3:11 PM
To: amd-gfx at lists.freedesktop.org
Cc: Ding, Pixel <Pixel.Ding at amd.com>
Subject: [PATCH 2/2] drm/amdgpu: retry init if exclusive mode request is failed

From: pding <Pixel.Ding at amd.com>

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 at amd.com>
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index daa2098..ef01aa3 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++) {

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