drm/amdgpu: bypass FB resizing for SRIOV VF

It introduces 900ms latency in exclusive mode which causes failure
of driver loading. Host can resize the BAR before guest staring,
so the resizing is not necessary here.

Signed-off-by: Pixel Ding <[email protected]>
Reviewed-by: Christian König <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index ddb50c48cb063b23a2d156a627f2100ca7c2e51e..05087eda0b712198faf84fc4e6e03f5e2ebed7b8 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -768,6 +768,10 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
        u16 cmd;
        int r;
 
+       /* Bypass for VF */
+       if (amdgpu_sriov_vf(adev))
+               return 0;
+
        /* Disable memory decoding while we change the BAR addresses and size */
        pci_read_config_word(adev->pdev, PCI_COMMAND, &cmd);
        pci_write_config_word(adev->pdev, PCI_COMMAND,