pinctrl: bcm2835: Avoid warning from __irq_do_set_handler

We get a warning during boot with enabled EARLY_PRINTK that
we try to set a irq_chip without data. This is caused by ignoring
the return value of irq_of_parse_and_map(). So avoid calling
gpiochip_set_chained_irqchip() in error case.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: 85ae9e512f43 ("pinctrl: bcm2835: switch to GPIOLIB_IRQCHIP")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 1eb7a1a..2308831 100644 (file)
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -1048,6 +1048,10 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
        for (i = 0; i < BCM2835_NUM_IRQS; i++) {
                pc->irq[i] = irq_of_parse_and_map(np, i);
                pc->irq_group[i] = i;
+
+               if (pc->irq[i] == 0)
+                       continue;
+
                /*
                 * Use the same handler for all groups: this is necessary
                 * since we use one gpiochip to cover all lines - the