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genirq/manage: Rework teardown_percpu_nmi() 

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/20250429065422.552884529@linutronix.de
pull/1250/head
Thomas Gleixner 2025-04-29 08:55:50 +02:00
parent 65dd1f7ca9
commit 5fec6d5cd2
1 changed files with 5 additions and 14 deletions
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17
kernel/irq/manage.c
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@ -2634,22 +2634,13 @@ int prepare_percpu_nmi(unsigned int irq)
*/
void teardown_percpu_nmi(unsigned int irq)
{
unsigned long flags;
struct irq_desc *desc;
WARN_ON(preemptible());
desc = irq_get_desc_lock(irq, &flags,
IRQ_GET_DESC_CHECK_PERCPU);
if (!desc)
scoped_irqdesc_get_and_lock(irq, IRQ_GET_DESC_CHECK_PERCPU) {
if (WARN_ON(!irq_is_nmi(scoped_irqdesc)))
return;
if (WARN_ON(!irq_is_nmi(desc)))
goto out;
irq_nmi_teardown(desc);
out:
irq_put_desc_unlock(desc, flags);
irq_nmi_teardown(scoped_irqdesc);
}
}
static int __irq_get_irqchip_state(struct irq_data *data, enum irqchip_irq_state which, bool *state)