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 7af0d5d..69e724c 100644 (file)
--- 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++) {