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genirq/manage: Rework enable_irq()

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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/20250429065422.071157729@linutronix.de
This commit is contained in:
Thomas Gleixner
2025-04-29 08:55:38 +02:00
parent 1b74444467
commit bddd10c554
1 changed files with 6 additions and 11 deletions
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17
kernel/irq/manage.c
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@@ -789,18 +789,13 @@ void __enable_irq(struct irq_desc *desc)
*/
void enable_irq(unsigned int irq)
{
unsigned long flags;
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
scoped_irqdesc_get_and_lock(irq, IRQ_GET_DESC_CHECK_GLOBAL) {
struct irq_desc *desc = scoped_irqdesc;
if (!desc)
return;
if (WARN(!desc->irq_data.chip,
KERN_ERR "enable_irq before setup/request_irq: irq %u\n", irq))
goto out;
__enable_irq(desc);
out:
irq_put_desc_busunlock(desc, flags);
if (WARN(!desc->irq_data.chip, "enable_irq before setup/request_irq: irq %u\n", irq))
return;
__enable_irq(desc);
}
}
EXPORT_SYMBOL(enable_irq);