linux-kernel - [PATCH] drm/cirrus: fix error handling in cirrus_device

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Date:	Sun, 28 Jul 2013 08:08:18 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	airlied@...ux.ie, daniel.vetter@...ll.ch, airlied@...il.com,
	paulmck@...ux.vnet.ibm.com, dhowells@...hat.com, davej@...hat.com
Cc:	yongjun_wei@...ndmicro.com.cn, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/cirrus: fix error handling in cirrus_device_init()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Fix the error handling in function cirrus_device_init() to avoid resources
leak in the error handling case.

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/gpu/drm/cirrus/cirrus_main.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/cirrus/cirrus_main.c b/drivers/gpu/drm/cirrus/cirrus_main.c
index 3a7a0ef..5f59bb0 100644
--- a/drivers/gpu/drm/cirrus/cirrus_main.c
+++ b/drivers/gpu/drm/cirrus/cirrus_main.c
@@ -138,17 +138,22 @@ int cirrus_device_init(struct cirrus_device *cdev,
 	}
 
 	cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size);
-
-	if (cdev->rmmio == NULL)
-		return -ENOMEM;
+	if (cdev->rmmio == NULL) {
+		ret = -ENOMEM;
+		goto err_ioremap;
+	}
 
 	ret = cirrus_vram_init(cdev);
-	if (ret) {
-		release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
-		return ret;
-	}
+	if (ret)
+		goto err_init;
 
 	return 0;
+
+err_init:
+	iounmap(cdev->rmmio);
+err_ioremap:
+	release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
+	return ret;
 }
 
 void cirrus_device_fini(struct cirrus_device *cdev)

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