From: Linas Vepstas Date: Thu, 27 Apr 2006 09:31:20 +0000 (-0700) Subject: [PATCH] powerpc/pseries: avoid crash in PCI code if mem system not up X-Git-Tag: v2.6.17-rc4~41^2~5 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=054d8ff37710efaebd1998ce94d366df315a354f;p=linux-2.6-omap-h63xx.git [PATCH] powerpc/pseries: avoid crash in PCI code if mem system not up The powerpc code is currently performing PCI setup before memory initialization. PCI setup touches PCI config space registers. If the PCI card is bad, this will evoke an error, which currrently can't be handled, as the PCI error recovery code expects kmalloc() to be functional. This patch will cause the system to punt instead of crashing with cpu 0x0: Vector: 300 (Data Access) at [c0000000004434d0] pc: c0000000000c06b4: .kmem_cache_alloc+0x8c/0xf4 lr: c00000000004ad6c: .eeh_send_failure_event+0x48/0xfc This patch will also print name of the offending pci device. Signed-off-by: Linas Vepstas Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c index a1bda6f96fd..40020c65c89 100644 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ b/arch/powerpc/platforms/pseries/eeh_event.c @@ -118,7 +118,15 @@ int eeh_send_failure_event (struct device_node *dn, { unsigned long flags; struct eeh_event *event; + char *location; + if (!mem_init_done) { + printk(KERN_ERR "EEH: event during early boot not handled\n"); + location = (char *) get_property(dn, "ibm,loc-code", NULL); + printk(KERN_ERR "EEH: device node = %s\n", dn->full_name); + printk(KERN_ERR "EEH: PCI location = %s\n", location); + return 1; + } event = kmalloc(sizeof(*event), GFP_ATOMIC); if (event == NULL) { printk (KERN_ERR "EEH: out of memory, event not handled\n");