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authorJiang Liu <liuj97@gmail.com>2012-08-28 23:43:54 +0800
committerBjorn Helgaas <bhelgaas@google.com>2012-09-12 14:10:33 -0600
commitddec11b1452599a006660e160b8a2b707bb0a276 (patch)
tree88b0985e2dc7b042b8ca449684aaf136ddd7352b /arch/ia64/sn
parent0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff)
ia64/PCI: Use hotplug-safe pci_get_domain_bus_and_slot()
Following code has a race window between pci_find_bus() and pci_get_slot() if PCI hotplug operation happens between them which removes the pci_bus. So use PCI hotplug safe interface pci_get_domain_bus_and_slot() instead, which also reduces code complexity. struct pci_bus *pci_bus = pci_find_bus(domain, busno); struct pci_dev *pci_dev = pci_get_slot(pci_bus, devfn); Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/ia64/sn')
-rw-r--r--arch/ia64/sn/kernel/io_common.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
index fbb5f2f87eed..8630875e74b5 100644
--- a/arch/ia64/sn/kernel/io_common.c
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -229,7 +229,6 @@ void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
{
int segment = pci_domain_nr(dev->bus);
struct pcibus_bussoft *bs;
- struct pci_bus *host_pci_bus;
struct pci_dev *host_pci_dev;
unsigned int bus_no, devfn;
@@ -245,8 +244,7 @@ void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
- host_pci_bus = pci_find_bus(segment, bus_no);
- host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+ host_pci_dev = pci_get_domain_bus_and_slot(segment, bus_no, devfn);
pcidev_info->host_pci_dev = host_pci_dev;
pcidev_info->pdi_linux_pcidev = dev;