linux-kernel - [PATCH 5.14 082/125] gpio: xgs-iproc: fix parsing of ngpios property

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Date:   Mon,  1 Nov 2021 10:17:35 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jonas Gorski <jonas.gorski@...il.com>,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Florian Fainelli <f.fainelli@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH 5.14 082/125] gpio: xgs-iproc: fix parsing of ngpios property

From: Jonas Gorski <jonas.gorski@...il.com>

commit 85fe6415c146d5d42ce300c12f1ecf4d4af47d40 upstream.

of_property_read_u32 returns 0 on success, not true, so we need to
invert the check to actually take over the provided ngpio value.

Fixes: 6a41b6c5fc20 ("gpio: Add xgs-iproc driver")
Signed-off-by: Jonas Gorski <jonas.gorski@...il.com>
Reviewed-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpio/gpio-xgs-iproc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpio/gpio-xgs-iproc.c
+++ b/drivers/gpio/gpio-xgs-iproc.c
@@ -224,7 +224,7 @@ static int iproc_gpio_probe(struct platf
 	}
 
 	chip->gc.label = dev_name(dev);
-	if (of_property_read_u32(dn, "ngpios", &num_gpios))
+	if (!of_property_read_u32(dn, "ngpios", &num_gpios))
 		chip->gc.ngpio = num_gpios;
 
 	irq = platform_get_irq(pdev, 0);