From 654abd0a7baf144998147787121da0f9422dafc8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 20 Jun 2017 01:37:32 +0200 Subject: [PATCH] x86/irq: Restructure fixup_irqs() Reorder fixup_irqs() so it matches the flow in the generic migration code. Signed-off-by: Thomas Gleixner Cc: Jens Axboe Cc: Marc Zyngier Cc: Michael Ellerman Cc: Keith Busch Cc: Peter Zijlstra Cc: Christoph Hellwig Link: http://lkml.kernel.org/r/20170619235445.774272454@linutronix.de --- arch/x86/kernel/irq.c | 46 +++++++++++++++++++------------------------ 1 file changed, 20 insertions(+), 26 deletions(-) diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index 9696007df67b..78bd2b84eac6 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -433,7 +433,6 @@ int check_irq_vectors_for_cpu_disable(void) void fixup_irqs(void) { unsigned int irq, vector; - static int warned; struct irq_desc *desc; struct irq_data *data; struct irq_chip *chip; @@ -441,18 +440,27 @@ void fixup_irqs(void) for_each_irq_desc(irq, desc) { const struct cpumask *affinity; - int break_affinity = 0; - int set_affinity = 1; + bool break_affinity = false; if (!desc) continue; - if (irq == 2) - continue; /* interrupt's are disabled at this point */ raw_spin_lock(&desc->lock); data = irq_desc_get_irq_data(desc); + chip = irq_data_get_irq_chip(data); + /* + * The interrupt descriptor might have been cleaned up + * already, but it is not yet removed from the radix + * tree. If the chip does not have an affinity setter, + * nothing to do here. + */ + if (!chip && !chip->irq_set_affinity) { + raw_spin_unlock(&desc->lock); + continue; + } + affinity = irq_data_get_affinity_mask(data); if (!irq_has_action(irq) || irqd_is_per_cpu(data) || @@ -485,30 +493,18 @@ void fixup_irqs(void) * affinity and use cpu_online_mask as fall back. */ if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) { - break_affinity = 1; + broke_affinity = true; affinity = cpu_online_mask; } - chip = irq_data_get_irq_chip(data); - /* - * The interrupt descriptor might have been cleaned up - * already, but it is not yet removed from the radix tree - */ - if (!chip) { - raw_spin_unlock(&desc->lock); - continue; - } - if (!irqd_can_move_in_process_context(data) && chip->irq_mask) chip->irq_mask(data); - if (chip->irq_set_affinity) { - ret = chip->irq_set_affinity(data, affinity, true); - if (ret == -ENOSPC) - pr_crit("IRQ %d set affinity failed because there are no available vectors. The device assigned to this IRQ is unstable.\n", irq); - } else { - if (!(warned++)) - set_affinity = 0; + ret = chip->irq_set_affinity(data, affinity, true); + if (ret) { + pr_crit("IRQ %u: Force affinity failed (%d)\n", + d->irq, ret); + broke_affinity = false; } /* @@ -522,10 +518,8 @@ void fixup_irqs(void) raw_spin_unlock(&desc->lock); - if (break_affinity && set_affinity) + if (broke_affinity) pr_notice("Broke affinity for irq %i\n", irq); - else if (!set_affinity) - pr_notice("Cannot set affinity for irq %i\n", irq); } /*