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Subject: [PATCH] powerpc: Don't crash on cell with 2 BEs when !CONFIG_NUMA
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Arnd Bergmann <arnd@arndb.de>
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Date: Tue, 10 Oct 2006 15:14:12 +1000
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	Paul Mackerras <paulus@samba.org>
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The SPU code will crash if CONFIG_NUMA is not set and SPUs are found on
a non-0 node. This workaround will ignore those SPEs and just print an
message in the kernel log.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Index: linux-cell/arch/powerpc/platforms/cell/spu_base.c
===================================================================
--- linux-cell.orig/arch/powerpc/platforms/cell/spu_base.c	2006-10-10 13:50:25.000000000 +1000
+++ linux-cell/arch/powerpc/platforms/cell/spu_base.c	2006-10-10 15:11:39.000000000 +1000
@@ -847,6 +847,17 @@ static int __init create_spu(struct devi
 	if (!spu)
 		goto out;
 
+	spu->node = find_spu_node_id(spe);
+	if (spu->node >= MAX_NUMNODES) {
+		printk(KERN_WARNING "SPE %s on node %d ignored,"
+		       " node number too big\n", spe->full_name, spu->node);
+		printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
+		return -ENODEV;
+	}
+	spu->nid = of_node_to_nid(spe);
+	if (spu->nid == -1)
+		spu->nid = 0;
+
 	ret = spu_map_device(spu, spe);
 	/* try old method */
 	if (ret)
@@ -854,10 +865,6 @@ static int __init create_spu(struct devi
 	if (ret)
 		goto out_free;
 
-	spu->node = find_spu_node_id(spe);
-	spu->nid = of_node_to_nid(spe);
-	if (spu->nid == -1)
-		spu->nid = 0;
 	ret = spu_map_interrupts(spu, spe);
 	if (ret)
 		ret = spu_map_interrupts_old(spu, spe);