linux-kernel - [PATCH] l4f00242t03: fix error handling in l4f00242t03

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Date:	Mon, 03 May 2010 14:42:44 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Alberto Panizzo <maramaopercheseimorto@...il.com>,
	";Richard Purdie" <rpurdie@...ux.intel.com>
Subject: [PATCH] l4f00242t03: fix error handling in l4f00242t03_probe


This patch includes below fixes for properly error handling:
1. In the case of kzalloc failure, simple return -ENOMEM instead of goto
err. ( priv is NULL in this case )
2. In the case of gpio_request fail for reset_gpio and data_enable_gpio,
   properly release resources by goto err and err2 respectively.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/video/backlight/l4f00242t03.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/video/backlight/l4f00242t03.c
b/drivers/video/backlight/l4f00242t03.c
index bcdb12c..a4632db 100644
--- a/drivers/video/backlight/l4f00242t03.c
+++ b/drivers/video/backlight/l4f00242t03.c
@@ -125,8 +125,7 @@ static int __devinit l4f00242t03_probe(struct
spi_device *spi)
 
 	if (priv == NULL) {
 		dev_err(&spi->dev, "No memory for this device.\n");
-		ret = -ENOMEM;
-		goto err;
+		return -ENOMEM;
 	}
 
 	dev_set_drvdata(&spi->dev, priv);
@@ -139,7 +138,7 @@ static int __devinit l4f00242t03_probe(struct
spi_device *spi)
 	if (ret) {
 		dev_err(&spi->dev,
 			"Unable to get the lcd l4f00242t03 reset gpio.\n");
-		return ret;
+		goto err;
 	}
 
 	ret = gpio_direction_output(pdata->reset_gpio, 1);
@@ -151,7 +150,7 @@ static int __devinit l4f00242t03_probe(struct
spi_device *spi)
 	if (ret) {
 		dev_err(&spi->dev,
 			"Unable to get the lcd l4f00242t03 data en gpio.\n");
-		return ret;
+		goto err2;
 	}
 
 	ret = gpio_direction_output(pdata->data_enable_gpio, 0);
-- 
1.5.4.3



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