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Commit 420aef8a authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Use check_device for amd_iommu_dma_supported 



The check_device logic needs to include the dma_supported
checks to be really sure. Merge the dma_supported logic into
check_device and use it to implement dma_supported.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 318afd41

arch/x86/kernel/amd_iommu.c

+19 −16
Original line number Diff line number Diff line
@@ -1375,9 +1375,27 @@ static struct notifier_block device_nb = { 
 */

static bool check_device(struct device *dev)

{

	u16 bdf;

	struct pci_dev *pcidev;



	if (!dev || !dev->dma_mask)

		return false;



	/* No device or no PCI device */

	if (!dev || dev->bus != &pci_bus_type)

		return false;



	pcidev = to_pci_dev(dev);



	bdf = calc_devid(pcidev->bus->number, pcidev->devfn);



	/* Out of our scope? */

	if (bdf > amd_iommu_last_bdf)

		return false;



	if (amd_iommu_rlookup_table[bdf] == NULL)

		return false;



	return true;

}
@@ -2065,22 +2083,7 @@ free_mem: 
 */

static int amd_iommu_dma_supported(struct device *dev, u64 mask)

{

	u16 bdf;

	struct pci_dev *pcidev;



	/* No device or no PCI device */

	if (!dev || dev->bus != &pci_bus_type)

		return 0;



	pcidev = to_pci_dev(dev);



	bdf = calc_devid(pcidev->bus->number, pcidev->devfn);



	/* Out of our scope? */

	if (bdf > amd_iommu_last_bdf)

		return 0;



	return 1;

	return check_device(dev);

}



/*