diff options
| author | Alex Chiang <achiang@hp.com> | 2009-03-20 14:56:31 -0600 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-03-20 14:57:58 -0700 |
| commit | 705b1aaa823e800490f157cd9366ad8cff385f5f (patch) | |
| tree | 634ea8ba227a305074938f49c110fea8e68e8bb3 /drivers/pci/probe.c | |
| parent | 3ed4fd96b3188406ac5357d9290bcffa08c65cf6 (diff) | |
| download | lwn-705b1aaa823e800490f157cd9366ad8cff385f5f.tar.gz lwn-705b1aaa823e800490f157cd9366ad8cff385f5f.zip | |
PCI: Introduce /sys/bus/pci/rescan
This interface allows the user to force a rescan of all PCI buses
in system, and rediscover devices that have been removed earlier.
pci_bus_attrs implementation from Trent Piepho.
Thanks to Vegard Nossum for discovering locking issues with the
sysfs interface.
Cc: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 60a8e5fec6c5..56c71e585f3d 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1228,13 +1228,13 @@ unsigned int __devinit pci_rescan_bus(struct pci_bus *bus) max = pci_scan_child_bus(bus); - up_read(&pci_bus_sem); + down_read(&pci_bus_sem); list_for_each_entry(dev, &bus->devices, bus_list) if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) if (dev->subordinate) pci_bus_size_bridges(dev->subordinate); - down_read(&pci_bus_sem); + up_read(&pci_bus_sem); pci_bus_assign_resources(bus); pci_enable_bridges(bus); |