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Commit 25b11ce2 authored by Alex Williamson's avatar Alex Williamson Committed by Joerg Roedel
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iommu/amd: Split init_iommu_group() from iommu_init_device() 



For a PCI device, aliases from the IVRS table won't be populated
into dma_alias_devfn until after iommu_init_device() is called on
each device.  We therefore want to split init_iommu_group() to
be called from a separate loop immediately following.

Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Cc: stable@vger.kernel.org # 3.17
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent f096c061

drivers/iommu/amd_iommu.c

+13 −14
Original line number Diff line number Diff line
@@ -260,17 +260,13 @@ static bool check_device(struct device *dev) 
	return true;

}



static int init_iommu_group(struct device *dev)

static void init_iommu_group(struct device *dev)

{

	struct iommu_group *group;



	group = iommu_group_get_for_dev(dev);



	if (IS_ERR(group))

		return PTR_ERR(group);



	if (!IS_ERR(group))

		iommu_group_put(group);

	return 0;

}



static int __last_alias(struct pci_dev *pdev, u16 alias, void *data)
@@ -340,7 +336,6 @@ static int iommu_init_device(struct device *dev) 
	struct pci_dev *pdev = to_pci_dev(dev);

	struct iommu_dev_data *dev_data;

	u16 alias;

	int ret;



	if (dev->archdata.iommu)

		return 0;
@@ -364,12 +359,6 @@ static int iommu_init_device(struct device *dev) 
		dev_data->alias_data = alias_data;

	}



	ret = init_iommu_group(dev);

	if (ret) {

		free_dev_data(dev_data);

		return ret;

	}



	if (pci_iommuv2_capable(pdev)) {

		struct amd_iommu *iommu;
@@ -455,6 +444,15 @@ int __init amd_iommu_init_devices(void) 
			goto out_free;

	}



	/*

	 * Initialize IOMMU groups only after iommu_init_device() has

	 * had a chance to populate any IVRS defined aliases.

	 */

	for_each_pci_dev(pdev) {

		if (check_device(&pdev->dev))

			init_iommu_group(&pdev->dev);

	}



	return 0;



out_free:
@@ -2415,6 +2413,7 @@ static int device_change_notifier(struct notifier_block *nb, 
	case BUS_NOTIFY_ADD_DEVICE:



		iommu_init_device(dev);

		init_iommu_group(dev);



		/*

		 * dev_data is still NULL and