linux-kernel - [PATCH 2/3] mfd: ezx-pcap - fix pcap_add

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Date:	Tue, 24 Aug 2010 13:45:49 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Daniel Ribeiro <drwyrm@...il.com>
Subject: [PATCH 2/3] mfd: ezx-pcap - fix pcap_add_subdev error path

1. return -ENOMEM if platform_device_alloc() fail.
2. call platform_device_put() if platform_device_add() fail.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/mfd/ezx-pcap.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 134c69a..d283d77 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -384,12 +384,20 @@ static int __devinit pcap_add_subdev(struct pcap_chip *pcap,
 						struct pcap_subdev *subdev)
 {
 	struct platform_device *pdev;
+	int ret;
 
 	pdev = platform_device_alloc(subdev->name, subdev->id);
+	if (!pdev)
+		return -ENOMEM;
+
 	pdev->dev.parent = &pcap->spi->dev;
 	pdev->dev.platform_data = subdev->platform_data;
 
-	return platform_device_add(pdev);
+	ret = platform_device_add(pdev);
+	if (ret)
+		platform_device_put(pdev);
+
+	return ret;
 }
 
 static int __devexit ezx_pcap_remove(struct spi_device *spi)
-- 
1.7.2



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