[PATCH] pinctrl: bcm2835: Accept fewer than expected IRQs

[Ivan T. Ivanov]

From: Phil Elwell <phil at raspberrypi.com>

The downstream .dts files only request two GPIO IRQs. Truncate the
array of parent IRQs when irq_of_parse_and_map returns 0.

Signed-off-by: Phil Elwell <phil at raspberrypi.com>
Signed-off-by: Ivan T. Ivanov <iivanov at suse.de>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 1d21129f7751..2c87af1180c4 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -1274,9 +1274,13 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 		char *name;
 
 		girq->parents[i] = irq_of_parse_and_map(np, i);
-		if (!is_7211)
+		if (!is_7211) {
+			if (!girq->parents[i]) {
+				girq->num_parents = i;
+				break;
+			}
 			continue;
-
+		}
 		/* Skip over the all banks interrupts */
 		pc->wake_irq[i] = irq_of_parse_and_map(np, i +
 						       BCM2835_NUM_IRQS + 1);
-- 
2.31.1