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| author | Bjorn Helgaas <bhelgaas@google.com> | 2016-02-24 20:43:45 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-04-11 21:08:06 +0200 |
| commit | f0af9593372abfde34460aa1250e670cc535a7d8 (patch) | |
| tree | 4f4914feebc665fd48149052ba07a8c50bc69791 /drivers/pci/pci.c | |
| parent | Linux 4.6-rc2 (diff) | |
| download | linux-f0af9593372abfde34460aa1250e670cc535a7d8.tar.xz linux-f0af9593372abfde34460aa1250e670cc535a7d8.zip | |
PCI: Add pci_add_dma_alias() to abstract implementation
Add a pci_add_dma_alias() interface to encapsulate the details of adding an
alias. No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 25e0327d4429..1162118d1093 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4578,6 +4578,20 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode, return 0; } +/** + * pci_add_dma_alias - Add a DMA devfn alias for a device + * @dev: the PCI device for which alias is added + * @devfn: alias slot and function + * + * This helper encodes 8-bit devfn as bit number in dma_alias_mask. + * It should be called early, preferably as PCI fixup header quirk. + */ +void pci_add_dma_alias(struct pci_dev *dev, u8 devfn) +{ + dev->dma_alias_devfn = devfn; + dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN; +} + bool pci_device_is_present(struct pci_dev *pdev) { u32 v; |