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| author | Alex Williamson <alex.williamson@redhat.com> | 2014-05-28 20:57:02 (GMT) |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-05-28 21:52:52 (GMT) |
| commit | c8fe16e3f96a9bb95a10cedb19d2be2d2d580940 (patch) | |
| tree | 56df91477693c6098939afdce0a75e7c604ee732 /drivers/pci/search.c | |
| parent | cc346a4714a59d08c118e8f33fd86692d3563133 (diff) | |
| download | linux-c8fe16e3f96a9bb95a10cedb19d2be2d2d580940.tar.xz | |
PCI: Add support for PCIe-to-PCI bridge DMA alias quirks
Several PCIe-to-PCI bridges fail to provide a PCIe capability, causing us
to handle them as conventional PCI devices when they really use the
requester ID of the secondary bus. We need to differentiate these from
PCIe-to-PCI bridges that actually use the conventional PCI ID when a PCIe
capability is not present, such as those found on the root complex of may
Intel chipsets. Add a dev_flag bit to identify devices to be handled as
standard PCIe-to-PCI bridges.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/search.c')
| -rw-r--r-- | drivers/pci/search.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/pci/search.c b/drivers/pci/search.c index 2c19f3f..df38f73 100644 --- a/drivers/pci/search.c +++ b/drivers/pci/search.c @@ -88,8 +88,14 @@ int pci_for_each_dma_alias(struct pci_dev *pdev, continue; } } else { - ret = fn(tmp, PCI_DEVID(tmp->bus->number, tmp->devfn), - data); + if (tmp->dev_flags & PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS) + ret = fn(tmp, + PCI_DEVID(tmp->subordinate->number, + PCI_DEVFN(0, 0)), data); + else + ret = fn(tmp, + PCI_DEVID(tmp->bus->number, + tmp->devfn), data); if (ret) return ret; } |