Re: [PATCH net-next v1 2/3] dinghai: add MSI-X interrupt pools
From: Andrew Lunn <andrew@lunn.ch>
Date: 2026-08-24 23:56:12
Also in:
lkml
+ * Device vectors are managed in per-purpose pools. An IRQ carries a + * refcount so that several event queues can share one vector; on + * raise, the interrupt is fanned out through an atomic notifier chain + * attached to the IRQ.
+static int zxdh_irq_get_locked(struct zxdh_irq *irq)
+{
+ lockdep_assert_held(&irq->pool->lock);
+ if (WARN_ON_ONCE(!irq->refcount))
+ return 0;
+
+ irq->refcount++;
Why not use kref?
Andrew