diff options
| author | Yijing Wang <wangyijing@huawei.com> | 2015-07-17 17:16:32 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-07-30 16:19:53 -0500 |
| commit | 017ffe64e8b8c8db0f50433a71da41c6a4e12710 (patch) | |
| tree | e15b309ad6ebf5322bb3c2a54ba244750dd57c0b /arch/powerpc | |
| parent | 67546762978f523749eac157903e0b01c18e083a (diff) | |
| download | linux-017ffe64e8b8c8db0f50433a71da41c6a4e12710.tar.bz2 | |
PCI: Hold pci_slot_mutex while searching bus->slots list
Previously, pci_setup_device() and similar functions searched the
pci_bus->slots list without any locking. It was possible for another
thread to update the list while we searched it.
Add pci_dev_assign_slot() to search the list while holding pci_slot_mutex.
[bhelgaas: changelog, fold in CONFIG_SYSFS fix]
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/pci_of_scan.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c index 42e02a2d570b..5e2debfc6ce5 100644 --- a/arch/powerpc/kernel/pci_of_scan.c +++ b/arch/powerpc/kernel/pci_of_scan.c @@ -126,7 +126,6 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, { struct pci_dev *dev; const char *type; - struct pci_slot *slot; dev = pci_alloc_dev(bus); if (!dev) @@ -145,10 +144,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, dev->needs_freset = 0; /* pcie fundamental reset required */ set_pcie_port_type(dev); - list_for_each_entry(slot, &dev->bus->slots, list) - if (PCI_SLOT(dev->devfn) == slot->number) - dev->slot = slot; - + pci_dev_assign_slot(dev); dev->vendor = get_int_prop(node, "vendor-id", 0xffff); dev->device = get_int_prop(node, "device-id", 0xffff); dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); |