diff options
| author | Jiang Liu <liuj97@gmail.com> | 2012-08-28 23:43:56 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-09-12 14:13:59 -0600 |
| commit | a9d18b37e408b10854e15a918849194a4e089001 (patch) | |
| tree | 45d1c01dcf4eddb4787f5acd03802bf7df6a8620 | |
| parent | f85567c89e2500d4ce4ca2702025a47fac684f21 (diff) | |
| download | linux-a9d18b37e408b10854e15a918849194a4e089001.tar.bz2 | |
PCI/cpcihp: 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>
| -rw-r--r-- | drivers/pci/hotplug/cpcihp_generic.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/pci/hotplug/cpcihp_generic.c b/drivers/pci/hotplug/cpcihp_generic.c index 81af764c629b..a6a71c41cdf8 100644 --- a/drivers/pci/hotplug/cpcihp_generic.c +++ b/drivers/pci/hotplug/cpcihp_generic.c @@ -154,12 +154,8 @@ static int __init cpcihp_generic_init(void) if(!r) return -EBUSY; - bus = pci_find_bus(0, bridge_busnr); - if (!bus) { - err("Invalid bus number %d", bridge_busnr); - return -EINVAL; - } - dev = pci_get_slot(bus, PCI_DEVFN(bridge_slot, 0)); + dev = pci_get_domain_bus_and_slot(0, bridge_busnr, + PCI_DEVFN(bridge_slot, 0)); if(!dev || dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) { err("Invalid bridge device %s", bridge); pci_dev_put(dev); |