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author | Steve French <sfrench@us.ibm.com> | 2006-06-25 15:57:32 (GMT) |
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committer | Steve French <sfrench@us.ibm.com> | 2006-06-25 15:57:32 (GMT) |
commit | bbe5d235ee201705530a7153b57e141cd77d818b (patch) | |
tree | e98c31b4cb2ced6357a87a02596f9ecdbd6dbb26 /drivers/pci/bus.c | |
parent | 189acaaef81b1d71aedd0d28810de24160c2e781 (diff) | |
parent | dfd8317d3340f03bc06eba6b58f0ec0861da4a13 (diff) | |
download | linux-bbe5d235ee201705530a7153b57e141cd77d818b.tar.xz |
Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'drivers/pci/bus.c')
-rw-r--r-- | drivers/pci/bus.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index eed67d9..7230926 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -81,9 +81,9 @@ void __devinit pci_bus_add_device(struct pci_dev *dev) { device_add(&dev->dev); - spin_lock(&pci_bus_lock); + down_write(&pci_bus_sem); list_add_tail(&dev->global_list, &pci_devices); - spin_unlock(&pci_bus_lock); + up_write(&pci_bus_sem); pci_proc_attach_device(dev); pci_create_sysfs_dev_files(dev); @@ -125,10 +125,10 @@ void __devinit pci_bus_add_devices(struct pci_bus *bus) */ if (dev->subordinate) { if (list_empty(&dev->subordinate->node)) { - spin_lock(&pci_bus_lock); + down_write(&pci_bus_sem); list_add_tail(&dev->subordinate->node, &dev->bus->children); - spin_unlock(&pci_bus_lock); + up_write(&pci_bus_sem); } pci_bus_add_devices(dev->subordinate); @@ -168,7 +168,7 @@ void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), struct list_head *next; bus = top; - spin_lock(&pci_bus_lock); + down_read(&pci_bus_sem); next = top->devices.next; for (;;) { if (next == &bus->devices) { @@ -180,22 +180,19 @@ void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), continue; } dev = list_entry(next, struct pci_dev, bus_list); - pci_dev_get(dev); if (dev->subordinate) { /* this is a pci-pci bridge, do its devices next */ next = dev->subordinate->devices.next; bus = dev->subordinate; } else next = dev->bus_list.next; - spin_unlock(&pci_bus_lock); - /* Run device routines with the bus unlocked */ + /* Run device routines with the device locked */ + down(&dev->dev.sem); cb(dev, userdata); - - spin_lock(&pci_bus_lock); - pci_dev_put(dev); + up(&dev->dev.sem); } - spin_unlock(&pci_bus_lock); + up_read(&pci_bus_sem); } EXPORT_SYMBOL_GPL(pci_walk_bus); |