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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: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-11-23 16:14:57 +01:00
parent 318afd41d2
commit 420aef8a3a
1 changed files with 19 additions and 16 deletions
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35
arch/x86/kernel/amd_iommu.c
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@ -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);
}
/*