genirq/irqdesc: Remove double locking in hwirq_show()

&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: 5d964a9 ("genirq/irqdesc: Switch to lock guards")
Signed-off-by: Claudiu Beznea <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/all/[email protected]

Author: claudiubeznea

kernel/irq/irqdesc.c

@@ -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;