From: Benjamin Herrenschmidt <b...@kernel.crashing.org> upstream commit: 574ce79cea9d3fda109ffcc82f81733de4740e5c
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 <b...@kernel.crashing.org> [Yongli: Change the 'intvec_top' to 'intvec_top + 1' since we need pass the irq count to function irq_domain_add_linear.] Signed-off-by: Yongli He <yongli...@windriver.com> --- arch/powerpc/sysdev/mpic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 395af13..9ee7043 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 + 1, &mpic_host_ops, mpic); /* -- 1.8.3 _______________________________________________ linux-yocto mailing list linux-yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/linux-yocto