linux-kernel - [PATCH 1/4] drivers/video/xen-fbfront.c: add missing cleanup code

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Message-Id: <1336140267-7399-2-git-send-email-konrad.wilk@oracle.com>
Date:	Fri,  4 May 2012 10:04:24 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org
Cc:	Julia Lawall <Julia.Lawall@...6.fr>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 1/4] drivers/video/xen-fbfront.c: add missing cleanup code

From: Julia Lawall <Julia.Lawall@...6.fr>

The operations in the subsequent error-handling code appear to be also
useful here.

Acked-by: Florian Tobias Schandinat <FlorianSchandinat@....de>
Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
[v1: Collapse some of the error handling functions]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 drivers/video/xen-fbfront.c |   25 +++++++++++++++----------
 1 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index cb4529c..aa42160 100644
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c
@@ -458,26 +458,31 @@ static int __devinit xenfb_probe(struct xenbus_device *dev,
 	xenfb_init_shared_page(info, fb_info);
 
 	ret = xenfb_connect_backend(dev, info);
-	if (ret < 0)
-		goto error;
+	if (ret < 0) {
+		xenbus_dev_fatal(dev, ret, "xenfb_connect_backend");
+		goto error_fb;
+	}
 
 	ret = register_framebuffer(fb_info);
 	if (ret) {
-		fb_deferred_io_cleanup(fb_info);
-		fb_dealloc_cmap(&fb_info->cmap);
-		framebuffer_release(fb_info);
 		xenbus_dev_fatal(dev, ret, "register_framebuffer");
-		goto error;
+		goto error_fb;
 	}
 	info->fb_info = fb_info;
 
 	xenfb_make_preferred_console();
 	return 0;
 
- error_nomem:
-	ret = -ENOMEM;
-	xenbus_dev_fatal(dev, ret, "allocating device memory");
- error:
+error_fb:
+	fb_deferred_io_cleanup(fb_info);
+	fb_dealloc_cmap(&fb_info->cmap);
+	framebuffer_release(fb_info);
+error_nomem:
+	if (!ret) {
+		ret = -ENOMEM;
+		xenbus_dev_fatal(dev, ret, "allocating device memory");
+	}
+error:
 	xenfb_remove(dev);
 	return ret;
 }
-- 
1.7.7.5

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