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Code

PCI: cpcihp: Iterate over all devices in slot, not functions 0-7

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Iterate through devices in a slot by using the upstream bridge's
"bus->devices" list instead of assuming they are functions 0-7.  It's
possible there are several slots on the same pci_bus, so restrict it to
only devices matching this slot's device number.

ARI (which allows functions 0-255) is a PCIe-only feature, and this is
a PCI hotplug driver, so we shouldn't find anything other than functions
0-7, but it's better to iterate the same way as other hotplug drivers.

[bhelgaas: changelog, check PCI_SLOT, fix cpci_unconfigure_slot()]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yijing Wang 2013-01-15 11:12:20 +08:00 committed by Bjorn Helgaas
parent ba518e3c17
commit 05b1250048
1 changed files with 11 additions and 18 deletions
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29
drivers/pci/hotplug/cpci_hotplug_pci.c
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@ -252,8 +252,8 @@ int cpci_led_off(struct slot* slot)
int __ref cpci_configure_slot(struct slot *slot) int __ref cpci_configure_slot(struct slot *slot)
{ {
struct pci_dev *dev;
struct pci_bus *parent; struct pci_bus *parent;
int fn;
dbg("%s - enter", __func__); dbg("%s - enter", __func__);
@ -282,18 +282,13 @@ int __ref cpci_configure_slot(struct slot *slot)
} }
parent = slot->dev->bus; parent = slot->dev->bus;
for (fn = 0; fn < 8; fn++) { list_for_each_entry(dev, &parent->devices, bus_list)
struct pci_dev *dev; if (PCI_SLOT(dev->devfn) != PCI_SLOT(slot->devfn))
dev = pci_get_slot(parent,
PCI_DEVFN(PCI_SLOT(slot->devfn), fn));
if (!dev)
continue; continue;
if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
(dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
pci_hp_add_bridge(dev); pci_hp_add_bridge(dev);
pci_dev_put(dev);
}
pci_assign_unassigned_bridge_resources(parent->self); pci_assign_unassigned_bridge_resources(parent->self);
@ -305,8 +300,7 @@ int __ref cpci_configure_slot(struct slot *slot)
int cpci_unconfigure_slot(struct slot* slot) int cpci_unconfigure_slot(struct slot* slot)
{ {
int i; struct pci_dev *dev, *temp;
struct pci_dev *dev;
dbg("%s - enter", __func__); dbg("%s - enter", __func__);
if (!slot->dev) { if (!slot->dev) {
@ -314,13 +308,12 @@ int cpci_unconfigure_slot(struct slot* slot)
return -ENODEV; return -ENODEV;
} }
for (i = 0; i < 8; i++) { list_for_each_entry_safe(dev, temp, &slot->bus->devices, bus_list) {
dev = pci_get_slot(slot->bus, if (PCI_SLOT(dev->devfn) != PCI_SLOT(slot->devfn))
PCI_DEVFN(PCI_SLOT(slot->devfn), i)); continue;
if (dev) { pci_dev_get(dev);
pci_stop_and_remove_bus_device(dev); pci_stop_and_remove_bus_device(dev);
pci_dev_put(dev); pci_dev_put(dev);
}
} }
pci_dev_put(slot->dev); pci_dev_put(slot->dev);
slot->dev = NULL; slot->dev = NULL;