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genirq/irqdesc: Remove double locking in hwirq_show()

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&desc->lock is acquired on 2 consecutive lines in hwirq_show(). This leads
obviously to a deadlock. Drop the raw_spin_lock_irq() and keep guard().

Fixes: 5d964a9f7c ("genirq/irqdesc: Switch to lock guards")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250521142541.3832130-1-claudiu.beznea.uj@bp.renesas.com
This commit is contained in:
Claudiu Beznea
2025-05-21 17:25:41 +03:00
committed by Thomas Gleixner
parent 788019eb55
commit a510bb87da
1 changed files with 0 additions and 1 deletions
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kernel/irq/irqdesc.c
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@@ -281,7 +281,6 @@ static ssize_t hwirq_show(struct kobject *kobj, struct kobj_attribute *attr, cha
struct irq_desc *desc = container_of(kobj, struct irq_desc, kobj);
guard(raw_spinlock_irq)(&desc->lock);
raw_spin_lock_irq(&desc->lock);
if (desc->irq_data.domain)
return sysfs_emit(buf, "%lu\n", desc->irq_data.hwirq);
return 0;