linux-kernel - [PATCH] pinctrl: madera: Fix possible NULL pointer with pdata config

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Date:   Tue, 28 Aug 2018 09:45:37 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <linus.walleij@...aro.org>
CC:     <patches@...nsource.cirrus.com>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH] pinctrl: madera: Fix possible NULL pointer with pdata config

If we are being configured via pdata we don't necessarily have
any gpio mappings being configured that way so pdata->gpio_config
could be NULL.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 drivers/pinctrl/cirrus/pinctrl-madera-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/cirrus/pinctrl-madera-core.c b/drivers/pinctrl/cirrus/pinctrl-madera-core.c
index ece41fb2848f..c4f4d904e4a6 100644
--- a/drivers/pinctrl/cirrus/pinctrl-madera-core.c
+++ b/drivers/pinctrl/cirrus/pinctrl-madera-core.c
@@ -1040,7 +1040,7 @@ static int madera_pin_probe(struct platform_device *pdev)
 	}
 
 	/* if the configuration is provided through pdata, apply it */
-	if (pdata) {
+	if (pdata && pdata->gpio_configs) {
 		ret = pinctrl_register_mappings(pdata->gpio_configs,
 						pdata->n_gpio_configs);
 		if (ret) {
-- 
2.11.0