linux-kernel - [PATCH] drivers/gpio/gpio-sch311x: check return value of gpiochip

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Date:	Fri,  4 Jul 2014 12:07:31 +0530
From:	Varka Bhadram <varkabhadram@...il.com>
To:	linux-gpio@...r.kernel.org
Cc:	linus.walleij@...aro.org, gnurou@...il.com,
	linux-kernel@...r.kernel.org, Varka Bhadram <varkab@...c.in>
Subject: [PATCH] drivers/gpio/gpio-sch311x: check return value of gpiochip_remove()

This patch eliminates the following warning

drivers/gpio/gpio-sch311x.c: In function ‘sch311x_gpio_probe’:
drivers/gpio/gpio-sch311x.c:286:18: warning: ignoring return value of ‘gpiochip_remove’, declared with attribute warn_unused_result

Signed-off-by: Varka Bhadram <varkab@...c.in>
---
 drivers/gpio/gpio-sch311x.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c
index f942b80..8a4ab8f 100644
--- a/drivers/gpio/gpio-sch311x.c
+++ b/drivers/gpio/gpio-sch311x.c
@@ -232,7 +232,7 @@ static int sch311x_gpio_probe(struct platform_device *pdev)
 	struct sch311x_pdev_data *pdata = pdev->dev.platform_data;
 	struct sch311x_gpio_priv *priv;
 	struct sch311x_gpio_block *block;
-	int err, i;
+	int err, i, ret;
 
 	/* we can register all GPIO data registers at once */
 	if (!request_region(pdata->runtime_reg + GP1, 6, DRV_NAME)) {
@@ -283,7 +283,11 @@ exit_err:
 	release_region(pdata->runtime_reg + GP1, 6);
 	/* release already registered chips */
 	for (--i; i >= 0; i--)
-		gpiochip_remove(&priv->blocks[i].chip);
+		ret = gpiochip_remove(&priv->blocks[i].chip);
+
+		WARN(ret, "%s(): gpiochip_remove() failed, ret=%d\n",
+		     __func__, ret);
+
 	return err;
 }
 
-- 
1.7.9.5

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