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genirq/manage: Rework irq_set_vcpu_affinity() 

Use the new guards to get and lock the interrupt descriptor and tidy up the
code.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/87ikmlq0fk.ffs@tglx
pull/1250/head
Thomas Gleixner 2025-03-13 17:00:39 +01:00
parent 7e04e5c6f6
commit 55ac0ad22f
1 changed files with 16 additions and 23 deletions
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39
kernel/irq/manage.c
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@ -629,32 +629,25 @@ int irq_setup_affinity(struct irq_desc *desc)
*/ */
int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info) int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info)
{ {
unsigned long flags; scoped_irqdesc_get_and_lock(irq, 0) {
struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0); struct irq_desc *desc = scoped_irqdesc;
struct irq_data *data; struct irq_data *data;
struct irq_chip *chip; struct irq_chip *chip;
int ret = -ENOSYS;
if (!desc) data = irq_desc_get_irq_data(desc);
return -EINVAL; do {
chip = irq_data_get_irq_chip(data);
if (chip && chip->irq_set_vcpu_affinity)
break;
data = irq_desc_get_irq_data(desc); data = irqd_get_parent_data(data);
do { } while (data);
chip = irq_data_get_irq_chip(data);
if (chip && chip->irq_set_vcpu_affinity)
break;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
data = data->parent_data;
#else
data = NULL;
#endif
} while (data);
if (data) if (!data)
ret = chip->irq_set_vcpu_affinity(data, vcpu_info); return -ENOSYS;
irq_put_desc_unlock(desc, flags); return chip->irq_set_vcpu_affinity(data, vcpu_info);
}
return ret; return -EINVAL;
} }
EXPORT_SYMBOL_GPL(irq_set_vcpu_affinity); EXPORT_SYMBOL_GPL(irq_set_vcpu_affinity);