[PATCH v2] drm/amdgpu: fix null pointer reference to adev.

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I hit this when compiling amdgpu in kernel. amdgpu_driver_load_kms fail
to load firmwares since GPU was initialized before rootfs is ready.
Just gracefully fail in such cases.

v2: Check return code of amdgpu_driver_load_kms

Signed-off-by: Lepton Wu <ytht.net@xxxxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 126e74758a34..75bcd1789185 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1111,7 +1111,9 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 
 	pci_set_drvdata(pdev, dev);
 
-	amdgpu_driver_load_kms(dev, ent->driver_data);
+	ret = amdgpu_driver_load_kms(dev, ent->driver_data);
+	if (ret)
+		goto err_pci;
 
 retry_init:
 	ret = drm_dev_register(dev, ent->driver_data);
-- 
2.27.0.212.ge8ba1cc988-goog

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