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 7af0d5d8cb1df81e6292db0afcd7784bc7a442f8..69e724c96442b21f7d38b0b781d2253a899272cc 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++) {