Commit d3689cd0 authored by Biju Das's avatar Biju Das Committed by Thomas Gleixner
Browse files

irqchip/renesas-rzg2l: Clear the shared interrupt bit in rzg2l_irqc_free() 



rzg2l_irqc_free() invokes irq_domain_free_irqs_common(), which internally
calls irq_domain_reset_irq_data(). That explicitly sets irq_data->hwirq to
0. Consequently, irqd_to_hwirq(d) returns 0 when called after it.

Since 0 falls outside the valid shared IRQ ranges,
rzg2l_irqc_is_shared_and_get_irq_num() evaluates to false, completely
bypassing the test_and_clear_bit() operation.

This leaves the bit set in priv->used_irqs, causing future allocations to
fail with -EBUSY.

Fix this by retrieving irq_data and caching hwirq before calling
irq_domain_free_irqs_common().

Fixes: e0fcae27 ("irqchip/renesas-rzg2l: Add shared interrupt support")
Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: default avatarThomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260328103324.134131-2-biju.das.jz@bp.renesas.com
parent 9fd2170d

drivers/irqchip/irq-renesas-rzg2l.c

+4 −5
Original line number Diff line number Diff line
@@ -698,15 +698,14 @@ static int rzg2l_irqc_alloc(struct irq_domain *domain, unsigned int virq, 


static void rzg2l_irqc_free(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs)

{

	struct irq_data *d = irq_domain_get_irq_data(domain, virq);

	struct rzg2l_irqc_priv *priv = domain->host_data;

	irq_hw_number_t hwirq = irqd_to_hwirq(d);



	irq_domain_free_irqs_common(domain, virq, nr_irqs);



	if (priv->info.shared_irq_cnt) {

		struct irq_data *d = irq_domain_get_irq_data(domain, virq);



		rzg2l_irqc_shared_irq_free(priv, irqd_to_hwirq(d));

	}

	if (priv->info.shared_irq_cnt)

		rzg2l_irqc_shared_irq_free(priv, hwirq);

}



static const struct irq_domain_ops rzg2l_irqc_domain_ops = {