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authorMark Rutland <mark.rutland@arm.com>2013-11-28 14:21:40 +0000
committerThomas Gleixner <tglx@linutronix.de>2013-11-28 15:41:53 +0100
commit08332dff8adebb74171e98e008d6c20de6658c42 (patch)
tree63e596dbab1e219c7d451766ffaaea721f30eee0 /drivers/irqchip
parentac01810c9d2814238f08a227062e66a35a0e1ea2 (diff)
downloadlinux-08332dff8adebb74171e98e008d6c20de6658c42.tar.bz2
irqchip: Gic: fix boot for chained gics
As of c0114709ed: "irqchip: gic: Perform the gic_secondary_init() call via CPU notifier", booting on a platform with chained gics (e.g. Realview EB ARM11MPCore) will result in the gic_cpu_notifier being registered twice, corrupting the cpu notifier list and rendering the platform unbootable. This patch ensures that we only register the notifier for the first gic, allowing platforms with chained gics to boot. At the same time we limit the pointlessly duplicated calls to set_smp_cross_call and set_handle_irq to the first gic registered. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: marc.zyngier@arm.com Cc: rob.herring@calxeda.com Cc: olof@lixom.net Link: http://lkml.kernel.org/r/1385648500-29048-1-git-send-email-mark.rutland@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index d0e948084eaf..e219a5bf0cac 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -814,12 +814,13 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
if (WARN_ON(!gic->domain))
return;
+ if (gic_nr == 0) {
#ifdef CONFIG_SMP
- set_smp_cross_call(gic_raise_softirq);
- register_cpu_notifier(&gic_cpu_notifier);
+ set_smp_cross_call(gic_raise_softirq);
+ register_cpu_notifier(&gic_cpu_notifier);
#endif
-
- set_handle_irq(gic_handle_irq);
+ set_handle_irq(gic_handle_irq);
+ }
gic_chip.flags |= gic_arch_extn.flags;
gic_dist_init(gic);