Re: pq2_find_bridges hangs system

Alex BASTOS wrote:

The Tranfer Error makes not many sense for me, as _TEA is pulled-up.
Maybe the oops after that is caused by the bad call return point?
 

I remember using this to prevent machine check exceptions during the PCI scan. This is in the beginning of the pciauto_bus_scan() function.

--- trunk/linux/arch/ppc/syslib/pci_auto.c	(revision 127)
+++ trunk/linux/arch/ppc/syslib/pci_auto.c	(revision 128)

@@ -382,6 +382,10 @@

	unsigned short vid;
	unsigned char header_type;

+
+	/* must ignore machine checks during scan */
+	*(volatile unsigned short *) 0xf0010888 &= ~0x0800;
+
	/*
	 * Fetch our I/O and memory space upper boundaries used
	 * to allocated base addresses on this hose.