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x86/irq: Restructure fixup_irqs() 

Reorder fixup_irqs() so it matches the flow in the generic migration code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235445.774272454@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-06-20 01:37:32 +02:00
parent 77f85e66aa
commit 654abd0a7b
1 changed files with 20 additions and 26 deletions
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46
arch/x86/kernel/irq.c
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@ -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);
}
/*