From: Lokesh Vutla lokeshvutla@ti.com
[ Upstream commit fc6c7cd3878641fd43189f15697e7ad0871f5c1a ]
ti_sci_intr_irq_domain_free() assumes that out_irq of intr is stored in data->chip_data and uses it for calling ti_sci irq_free() and then mark the out_irq as available resource. But ti_sci_intr_irq_domain_alloc() is storing p_hwirq(parent's hardware irq) which is translated from out_irq. This is causing resource leakage and eventually out_irq resources might be exhausted. Fix ti_sci_intr_irq_domain_alloc() by storing the out_irq in data->chip_data.
Fixes: a5b659bd4bc7 ("irqchip/ti-sci-intr: Add support for INTR being a parent to INTR") Signed-off-by: Lokesh Vutla lokeshvutla@ti.com Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20201102120631.11165-1-lokeshvutla@ti.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/irqchip/irq-ti-sci-intr.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/irqchip/irq-ti-sci-intr.c b/drivers/irqchip/irq-ti-sci-intr.c index ac9d6d658e65c..fe8fad22bcf96 100644 --- a/drivers/irqchip/irq-ti-sci-intr.c +++ b/drivers/irqchip/irq-ti-sci-intr.c @@ -129,7 +129,7 @@ static void ti_sci_intr_irq_domain_free(struct irq_domain *domain, * @virq: Corresponding Linux virtual IRQ number * @hwirq: Corresponding hwirq for the IRQ within this IRQ domain * - * Returns parent irq if all went well else appropriate error pointer. + * Returns intr output irq if all went well else appropriate error pointer. */ static int ti_sci_intr_alloc_parent_irq(struct irq_domain *domain, unsigned int virq, u32 hwirq) @@ -173,7 +173,7 @@ static int ti_sci_intr_alloc_parent_irq(struct irq_domain *domain, if (err) goto err_msg;
- return p_hwirq; + return out_irq;
err_msg: irq_domain_free_irqs_parent(domain, virq, 1); @@ -198,19 +198,19 @@ static int ti_sci_intr_irq_domain_alloc(struct irq_domain *domain, struct irq_fwspec *fwspec = data; unsigned long hwirq; unsigned int flags; - int err, p_hwirq; + int err, out_irq;
err = ti_sci_intr_irq_domain_translate(domain, fwspec, &hwirq, &flags); if (err) return err;
- p_hwirq = ti_sci_intr_alloc_parent_irq(domain, virq, hwirq); - if (p_hwirq < 0) - return p_hwirq; + out_irq = ti_sci_intr_alloc_parent_irq(domain, virq, hwirq); + if (out_irq < 0) + return out_irq;
irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &ti_sci_intr_irq_chip, - (void *)(uintptr_t)p_hwirq); + (void *)(uintptr_t)out_irq);
return 0; }