From: Benjamin Herrenschmidt Date: Sun, 22 Jul 2012 16:45:43 +0000 (+0000) Subject: powerpc/mpic: Create a revmap with enough entries for IPIs and timers X-Git-Tag: v3.6-rc1~132^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=574ce79cea9d3fda109ffcc82f81733de4740e5c;p=platform%2Fkernel%2Flinux-exynos.git powerpc/mpic: Create a revmap with enough entries for IPIs and timers The current mpic code creates a linear revmap just big enough for all the sources, which happens to miss the IPIs and timers on some machines. This will in turn break when the irqdomain code loses the fallback of doing a linear search when the revmap fails (and really slows down IPIs otherwise). This happens for example on the U4 based Apple machines such as the dual core PowerMac G5s. Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 906f29c..bfc6211 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1376,7 +1376,7 @@ struct mpic * __init mpic_alloc(struct device_node *node, mpic->isu_mask = (1 << mpic->isu_shift) - 1; mpic->irqhost = irq_domain_add_linear(mpic->node, - last_irq + 1, + intvec_top, &mpic_host_ops, mpic); /*