iommu/amd: Handle error path in amd_iommu_probe_device()

Do not try to set max_pasids in error path as dev_data is not allocated.

Fixes: a0c47f2 ("iommu/amd: Introduce iommu_dev_data.max_pasids")
Signed-off-by: Vasant Hegde <[email protected]>
Reviewed-by: Suravee Suthikulpanit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

Author: hegdevasant

drivers/iommu/amd/iommu.c

@@ -2187,11 +2187,12 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
 		dev_err(dev, "Failed to initialize - trying to proceed anyway\n");
 		iommu_dev = ERR_PTR(ret);
 		iommu_ignore_device(iommu, dev);
-	} else {
-		amd_iommu_set_pci_msi_domain(dev, iommu);
-		iommu_dev = &iommu->iommu;
+		goto out_err;
 	}
 
+	amd_iommu_set_pci_msi_domain(dev, iommu);
+	iommu_dev = &iommu->iommu;
+
 	/*
 	 * If IOMMU and device supports PASID then it will contain max
 	 * supported PASIDs, else it will be zero.
@@ -2203,6 +2204,7 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
 					     pci_max_pasids(to_pci_dev(dev)));
 	}
 
+out_err:
 	iommu_completion_wait(iommu);
 
 	return iommu_dev;