system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-11-05 18:23:50 +00:00
Code Issues Projects Releases Packages Wiki Activity

xen/pci: Try harder to get PXM information for Xen

Browse source 
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>
This commit is contained in:
Ross Lagerwall 2015-04-09 08:05:10 +01:00 committed by David Vrabel
parent ccc9d90a9a
commit 0b97b03d88
1 changed files with 13 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/xen/pci.c
View file

@ -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;