[patch 05/66] irqchip/armada-370-xp: Convert to hotplug state machine
From: Anna-Maria Gleixner <anna-maria@linutronix.de>
Date: 2016-07-11 12:48:29
From: Richard Cochran <redacted> Install the callbacks via the state machine. Signed-off-by: Richard Cochran <redacted> Cc: Jason Cooper <redacted> Cc: Marc Zyngier <redacted> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> --- drivers/irqchip/irq-armada-370-xp.c | 44 ++++++++++++------------------------ include/linux/cpuhotplug.h | 2 + 2 files changed, 17 insertions(+), 29 deletions(-)
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c@@ -344,40 +344,22 @@ static void armada_mpic_send_doorbell(co writel((map << 8) | irq, main_int_base + ARMADA_370_XP_SW_TRIG_INT_OFFS); } +#endif -static int armada_xp_mpic_secondary_init(struct notifier_block *nfb, - unsigned long action, void *hcpu) +static int armada_xp_mpic_starting_cpu(unsigned int cpu) { - if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) { - armada_xp_mpic_perf_init(); - armada_xp_mpic_smp_cpu_init(); - } - - return NOTIFY_OK; + armada_xp_mpic_perf_init(); + armada_xp_mpic_smp_cpu_init(); + return 0; } -static struct notifier_block armada_370_xp_mpic_cpu_notifier = { - .notifier_call = armada_xp_mpic_secondary_init, - .priority = 100, -}; - -static int mpic_cascaded_secondary_init(struct notifier_block *nfb, - unsigned long action, void *hcpu) +static int mpic_cascaded_starting_cpu(unsigned int cpu) { - if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) { - armada_xp_mpic_perf_init(); - enable_percpu_irq(parent_irq, IRQ_TYPE_NONE); - } - - return NOTIFY_OK; + armada_xp_mpic_perf_init(); + enable_percpu_irq(parent_irq, IRQ_TYPE_NONE); + return 0; } -static struct notifier_block mpic_cascaded_cpu_notifier = { - .notifier_call = mpic_cascaded_secondary_init, - .priority = 100, -}; -#endif /* CONFIG_SMP */ - static const struct irq_domain_ops armada_370_xp_mpic_irq_ops = { .map = armada_370_xp_mpic_irq_map, .xlate = irq_domain_xlate_onecell,
@@ -595,11 +577,15 @@ static int __init armada_370_xp_mpic_of_ set_handle_irq(armada_370_xp_handle_irq); #ifdef CONFIG_SMP set_smp_cross_call(armada_mpic_send_doorbell); - register_cpu_notifier(&armada_370_xp_mpic_cpu_notifier); + cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_ARMADA_XP_STARTING, + "AP_IRQ_ARMADA_XP_STARTING", + armada_xp_mpic_starting_cpu, NULL); #endif } else { #ifdef CONFIG_SMP - register_cpu_notifier(&mpic_cascaded_cpu_notifier); + cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_ARMADA_CASC_STARTING, + "AP_IRQ_ARMADA_CASC_STARTING", + mpic_cascaded_starting_cpu, NULL); #endif irq_set_chained_handler(parent_irq, armada_370_xp_mpic_handle_cascade_irq); --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h
@@ -12,6 +12,8 @@ enum cpuhp_state { CPUHP_AP_IRQ_GIC_STARTING, CPUHP_AP_IRQ_GICV3_STARTING, CPUHP_AP_IRQ_HIP04_STARTING, + CPUHP_AP_IRQ_ARMADA_XP_STARTING, + CPUHP_AP_IRQ_ARMADA_CASC_STARTING, CPUHP_AP_NOTIFY_STARTING, CPUHP_AP_ONLINE, CPUHP_TEARDOWN_CPU,