From: Insu Yun <wuninsu@gmail.com>
Date: Tue, 16 Feb 2016 02:19:57 +0000 (-0500)
Subject: gpio-mcp23s08: correctly handling failed allocation
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=aaf2b3afb93102411412f9dad8d84b13fc7f7edb;p=deliverable%2Flinux.git

gpio-mcp23s08: correctly handling failed allocation

Since devm_kzalloc can be failed in memory pressure,
it needs to check and return -ENOMEM

Signed-off-by: Insu Yun <wuninsu@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index c767879e4dd9..f8d4abcff573 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -803,6 +803,8 @@ static int mcp230xx_probe(struct i2c_client *client,
 			pdata = devm_kzalloc(&client->dev,
 					sizeof(struct mcp23s08_platform_data),
 					GFP_KERNEL);
+			if (!pdata)
+				return -ENOMEM;
 			pdata->base = -1;
 		}
 	}