openwrt/target/linux/bcm27xx/patches-5.10/950-0187-pinctrl-bcm2835-Accept-fewer-than-expected-IRQs.patch

From 9ab71458b5475c7d8d42896721e593f6ef1a5c7a Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Tue, 25 Feb 2020 17:38:20 +0000
Subject: [PATCH] pinctrl: bcm2835: Accept fewer than expected IRQs

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@raspberrypi.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -1290,9 +1290,13 @@ static int bcm2835_pinctrl_probe(struct
 		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);