linux-kernel - [PATCH] regulator: lm363x: Check return value of gpiod_get_index

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Date:   Fri,  8 Feb 2019 22:11:52 +0800
From:   Axel Lin <axel.lin@...ics.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, Axel Lin <axel.lin@...ics.com>
Subject: [PATCH] regulator: lm363x: Check return value of gpiod_get_index_optional

gpiod_get_index_optional can return ERR_PTR, add IS_ERR checking for it.
While at it, also remove a redundant NULL test for gpiod in error path.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/lm363x-regulator.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
index 8c0e8419c43f..c876e161052a 100644
--- a/drivers/regulator/lm363x-regulator.c
+++ b/drivers/regulator/lm363x-regulator.c
@@ -258,6 +258,9 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	 * Register update is required if the pin is used.
 	 */
 	gpiod = lm363x_regulator_of_get_enable_gpio(dev, id);
+	if (IS_ERR(gpiod))
+		return PTR_ERR(gpiod);
+
 	if (gpiod) {
 		cfg.ena_gpiod = gpiod;
 
@@ -265,8 +268,7 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 					 LM3632_EXT_EN_MASK,
 					 LM3632_EXT_EN_MASK);
 		if (ret) {
-			if (gpiod)
-				gpiod_put(gpiod);
+			gpiod_put(gpiod);
 			dev_err(dev, "External pin err: %d\n", ret);
 			return ret;
 		}
-- 
2.17.1