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authorYinghai Lu <yinghai@kernel.org>2012-01-21 02:08:22 -0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-02-14 08:44:53 -0800
commit2f320521a0d2d11fb857be09d05e2fbbf3ef8c13 (patch)
tree9b8d91f3d64f383405511c33fd4d9c5d4aaa20c2 /drivers/pci/pci-sysfs.c
parent8424d7592eab8245b51051ee458e598213bca3b2 (diff)
downloadop-kernel-dev-2f320521a0d2d11fb857be09d05e2fbbf3ef8c13.zip
op-kernel-dev-2f320521a0d2d11fb857be09d05e2fbbf3ef8c13.tar.gz
PCI: Make rescan bus increase bridge resource size if needed
Current rescan will not touch bridge MMIO and IO. Try to reuse pci_assign_unassigned_bridge_resources(bridge) to update bridge resources, if child devices need more resources. Only do that for bridges whose children are all removed already; i.e. don't release resources that could already be in use by drivers on child devices. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
-rw-r--r--drivers/pci/pci-sysfs.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index a3cd8ca..d972303 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -366,7 +366,10 @@ dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
if (val) {
mutex_lock(&pci_remove_rescan_mutex);
- pci_rescan_bus(bus);
+ if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
+ pci_rescan_bus_bridge_resize(bus->self);
+ else
+ pci_rescan_bus(bus);
mutex_unlock(&pci_remove_rescan_mutex);
}
return count;
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