From 51e0eaf98d48dc6fc385d1aee9e208afe3ce0cf1 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 23 Apr 2013 02:14:51 +0000 Subject: [PATCH] powerpc/cell: Only iterate over online nodes in cbe_init_pm_irq() None of the cell platforms support CPU hotplug, so we should iterate only over online nodes when setting PMU interrupts. This also fixes a warning during boot when NODES_SHIFT is large enough: WARNING: at /scratch/michael/src/kmk/linus/kernel/irq/irqdomain.c:766 ... NIP [c0000000000db278] .irq_linear_revmap+0x30/0x58 LR [c0000000000dc2a0] .irq_create_mapping+0x38/0x1a8 Call Trace: [c0000003fc9c3af0] [c0000000000dc2a0] .irq_create_mapping+0x38/0x1a8 (unreliable) [c0000003fc9c3b80] [c000000000655c1c] .__machine_initcall_cell_cbe_init_pm_irq+0x84/0x158 [c0000003fc9c3c20] [c00000000000afb4] .do_one_initcall+0x5c/0x1e0 [c0000003fc9c3cd0] [c000000000644580] .kernel_init_freeable+0x238/0x328 [c0000003fc9c3db0] [c00000000000b784] .kernel_init+0x1c/0x120 [c0000003fc9c3e30] [c000000000009fb8] .ret_from_kernel_thread+0x64/0xac This is caused by us overflowing our linear revmap because we're requesting too many interrupts. Reported-by: Dennis Schridde Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/cell/pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/cell/pmu.c b/arch/powerpc/platforms/cell/pmu.c index 59c1a1694104..348a27b12512 100644 --- a/arch/powerpc/platforms/cell/pmu.c +++ b/arch/powerpc/platforms/cell/pmu.c @@ -382,7 +382,7 @@ static int __init cbe_init_pm_irq(void) unsigned int irq; int rc, node; - for_each_node(node) { + for_each_online_node(node) { irq = irq_create_mapping(NULL, IIC_IRQ_IOEX_PMI | (node << IIC_IRQ_NODE_SHIFT)); if (irq == NO_IRQ) { -- 2.30.2