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SubjectRe: [PATCH] PCI fixes for 2.5.62
ChangeSet 1.1005, 2003/02/20 14:23:58-08:00, greg@kroah.com

[PATCH] PCI i386: remove large stack usage in pcibios_fixup_peer_bridges()


diff -Nru a/arch/i386/pci/legacy.c b/arch/i386/pci/legacy.c
--- a/arch/i386/pci/legacy.c Thu Feb 20 16:46:27 2003
+++ b/arch/i386/pci/legacy.c Thu Feb 20 16:46:27 2003
@@ -12,28 +12,39 @@
static void __devinit pcibios_fixup_peer_bridges(void)
{
int n;
- struct pci_bus bus;
- struct pci_dev dev;
+ struct pci_bus *bus;
+ struct pci_dev *dev;
u16 l;

if (pcibios_last_bus <= 0 || pcibios_last_bus >= 0xff)
return;
DBG("PCI: Peer bridge fixup\n");
+
+ bus = kmalloc(sizeof(*bus), GFP_ATOMIC);
+ dev = kmalloc(sizeof(*dev), GFP_ATOMIC);
+ if (!bus || !dev) {
+ printk(KERN_ERR "Out of memory in %s\n", __FUNCTION__);
+ goto exit;
+ }
+
for (n=0; n <= pcibios_last_bus; n++) {
if (pci_bus_exists(&pci_root_buses, n))
continue;
- bus.number = n;
- bus.ops = pci_root_ops;
- dev.bus = &bus;
- for(dev.devfn=0; dev.devfn<256; dev.devfn += 8)
- if (!pci_read_config_word(&dev, PCI_VENDOR_ID, &l) &&
+ bus->number = n;
+ bus->ops = pci_root_ops;
+ dev->bus = bus;
+ for (dev->devfn=0; dev->devfn<256; dev->devfn += 8)
+ if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
l != 0x0000 && l != 0xffff) {
- DBG("Found device at %02x:%02x [%04x]\n", n, dev.devfn, l);
+ DBG("Found device at %02x:%02x [%04x]\n", n, dev->devfn, l);
printk(KERN_INFO "PCI: Discovered peer bus %02x\n", n);
pci_scan_bus(n, pci_root_ops, NULL);
break;
}
}
+exit:
+ kfree(dev);
+ kfree(bus);
}

static int __init pci_legacy_init(void)
-
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