[PATCH] Solved: 2.4.20, 2.5.66 have different IDE channel

[Chuck Ebbert]

  2.4 builds its global PCI device list in breadth-first order.

  2.5 is doing the scan that way but defers the construction of the
global list until later and then does it depth-first.  This causes
devices to found in different order by drivers. The below fixed that
problem for me:

--- linux-2.5.66-ref/drivers/pci/bus.c	Sat Mar 29 09:16:22 2003
+++ linux-2.5.66-uni/drivers/pci/bus.c	Fri Apr 18 19:08:04 2003
@ -75,7 +75,8 @
  * Add newly discovered PCI devices (which are on the bus->devices
  * list) to the global PCI device list, add the sysfs and procfs
  * entries.  Where a bridge is found, add the discovered bus to
- * the parents list of child buses, and recurse.
+ * the parents list of child buses, and recurse (breadth-first
+ * to be compatible with 2.4)
  *
  * Call hotplug for each new devices.
  */
@ -98,6 +99,12 @
 #endif
 		pci_create_sysfs_dev_files(dev);
 
+	}
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+
+		BUG_ON(list_empty(&dev->global_list));
+
 		/*
 		 * If there is an unattached subordinate bus, attach
 		 * it and then scan for unattached PCI devices.

------
 Chuck