diff options
| author | Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> | 2025-05-21 17:25:41 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-05-21 17:48:23 +0200 |
| commit | a510bb87da72aa8d1504b0e4b343cfe013ee8a89 (patch) | |
| tree | 1802646b1acdf6904b72ad1da3e2ef7d4683b3d7 | |
| parent | 788019eb559fd0b365f501467ceafce540e377cc (diff) | |
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: 5d964a9f7cd8 ("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
| -rw-r--r-- | kernel/irq/irqdesc.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 6d006a68ff85..b64c57b44c20 100644 --- a/kernel/irq/irqdesc.c +++ b/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; |