The PCI bridge driver now checks if changing bridge_ctrl is necessary.
It also restores the original bridge_ctl settings when finished scanning
for devices. Finally, a pci_bus setup fix is included.
Signed-off-by: Adam Belay <[email protected]>
--- a/drivers/pci/bus/pci-bridge.c 2005-07-12 01:45:46.000000000 -0400
+++ b/drivers/pci/bus/pci-bridge.c 2005-07-14 02:09:15.000000000 -0400
@@ -30,7 +30,7 @@
bus->bridge = &dev->dev;
bus->ops = bus->parent->ops;
bus->sysdata = bus->parent->sysdata;
- bus->bridge = get_device(&dev->dev);
+ bus->self = dev;
/* Set up default resource pointers and names.. */
for (i = 0; i < 4; i++) {
@@ -82,12 +82,7 @@
if (!bus)
return NULL;
- /* Disable MasterAbortMode during probing to avoid reporting
- * of bus errors (in some architectures)
- */
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &bctl);
- pci_write_config_word(dev, PCI_BRIDGE_CONTROL,
- bctl & ~PCI_BRIDGE_CTL_MASTER_ABORT);
bus->number = bus->secondary = busnr;
bus->primary = buses & 0xFF;
@@ -105,10 +100,22 @@
{
unsigned int devfn;
+ /* Disable MasterAbortMode during probing to avoid reporting
+ * of bus errors (in some architectures)
+ */
+ if (!(bus->bridge_ctl & PCI_BRIDGE_CTL_MASTER_ABORT))
+ pci_write_config_word(bus->self, PCI_BRIDGE_CONTROL,
+ bus->bridge_ctl & ~PCI_BRIDGE_CTL_MASTER_ABORT);
+
/* Go find them, Rover! */
for (devfn = 0; devfn < 0x100; devfn += 8)
pci_scan_slot(bus, devfn);
+ /* restore the original bridge_ctl configuration */
+ if (!(bus->bridge_ctl & PCI_BRIDGE_CTL_MASTER_ABORT))
+ pci_write_config_word(bus->self, PCI_BRIDGE_CONTROL,
+ bus->bridge_ctl);
+
pcibios_fixup_bus(bus);
pci_bus_add_devices(bus);
}
-
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