[PATCH] irqchip/imx-irqsteer: Fix irq handling if an error occurs in imx_irqsteer_irq_handler()

[Christophe JAILLET]

chained_irq_enter(() should be paired with a corresponding
chained_irq_exit().

Here, if (hwirq < 0), a early return occurs and chained_irq_exit() is not
called.

Add a new label and a goto for fix it.

Fixes: 28528fca4908 ("irqchip/imx-irqsteer: Add multi output interrupts support")
Signed-off-by: Christophe JAILLET <christophe.jaillet at wanadoo.fr>
---
Compile tested only.

Review with care, irq handling is sometimes tricky...
---
 drivers/irqchip/irq-imx-irqsteer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
index 75a0e980ff35..59abe5a8beb8 100644
--- a/drivers/irqchip/irq-imx-irqsteer.c
+++ b/drivers/irqchip/irq-imx-irqsteer.c
@@ -135,7 +135,7 @@ static void imx_irqsteer_irq_handler(struct irq_desc *desc)
 	if (hwirq < 0) {
 		pr_warn("%s: unable to get hwirq base for irq %d\n",
 			__func__, irq);
-		return;
+		goto out;
 	}
 
 	for (i = 0; i < 2; i++, hwirq += 32) {
@@ -153,6 +153,7 @@ static void imx_irqsteer_irq_handler(struct irq_desc *desc)
 			generic_handle_domain_irq(data->domain, pos + hwirq);
 	}
 
+out:
 	chained_irq_exit(irq_desc_get_chip(desc), desc);
 }
 
-- 
2.47.0