irqchip/riscv-intc: Add missing free() callback in riscv_intc_domain_ops

The irq_domain_free_irqs() helper requires that the irq_domain_ops->free
callback is implemented. Otherwise, the kernel reports the warning message
"NULL pointer, cannot free irq" when irq_dispose_mapping() is invoked to
release the per-HART local interrupts.

Set irq_domain_ops->free to irq_domain_free_irqs_top() to cure that.

Fixes: 832f15f42646 ("RISC-V: Treat IPIs as normal Linux IRQs")
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20251114-rv-intc-fix-v1-1-a3edd1c1a868@sifive.com

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index e5805885394ee3892a9a9784a937e234490ba0ea..70290b35b3173eb1fd5eb448f5432735210b5444 100644 (file)
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -166,7 +166,8 @@ static int riscv_intc_domain_alloc(struct irq_domain *domain,
 static const struct irq_domain_ops riscv_intc_domain_ops = {
        .map    = riscv_intc_domain_map,
        .xlate  = irq_domain_xlate_onecell,
-       .alloc  = riscv_intc_domain_alloc
+       .alloc  = riscv_intc_domain_alloc,
+       .free   = irq_domain_free_irqs_top,
 };
 
 static struct fwnode_handle *riscv_intc_hwnode(void)