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| author |   Ross Lagerwall <ross.lagerwall@citrix.com> | 2015-04-09 08:05:10 +0100 |
|---|---|---|
| committer |   David Vrabel <david.vrabel@citrix.com> | 2015-04-15 10:57:28 +0100 |
| commit | 0b97b03d88b40bfbd7ff0e069186a137d9786d43 (patch) | |
| tree | 37feef841dd5c71bbc22c92137bc94241b74b91f /drivers/xen | |
| parent | xenbus_client: Extend interface to support multi-page ring (diff) | |
| download | linux-dev-0b97b03d88b40bfbd7ff0e069186a137d9786d43.tar.xz linux-dev-0b97b03d88b40bfbd7ff0e069186a137d9786d43.zip | |
xen/pci: Try harder to get PXM information for Xen
If the device being added to Xen is not contained in the ACPI table,
walk the PCI device tree to find a parent that is contained in the ACPI
table before finding the PXM information from this device.
Previously, it would try to get a handle for the device, then the
device's bridge, then the physfn. This changes the order so that it
tries to get a handle for the device, then the physfn, the walks up the
PCI device tree.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/pci.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/xen/pci.c b/drivers/xen/pci.c index 95ee4302ffb8..7494dbeb4409 100644 --- a/drivers/xen/pci.c +++ b/drivers/xen/pci.c @@ -19,6 +19,7 @@ #include <linux/pci.h> #include <linux/acpi.h> +#include <linux/pci-acpi.h> #include <xen/xen.h> #include <xen/interface/physdev.h> #include <xen/interface/xen.h> @@ -67,12 +68,22 @@ static int xen_add_device(struct device *dev) #ifdef CONFIG_ACPI handle = ACPI_HANDLE(&pci_dev->dev); - if (!handle && pci_dev->bus->bridge) - handle = ACPI_HANDLE(pci_dev->bus->bridge); #ifdef CONFIG_PCI_IOV if (!handle && pci_dev->is_virtfn) handle = ACPI_HANDLE(physfn->bus->bridge); #endif + if (!handle) { + /* + * This device was not listed in the ACPI name space at + * all. Try to get acpi handle of parent pci bus. + */ + struct pci_bus *pbus; + for (pbus = pci_dev->bus; pbus; pbus = pbus->parent) { + handle = acpi_pci_get_bridge_handle(pbus); + if (handle) + break; + } + } if (handle) { acpi_status status; |