linux-kernel - [PATCH 3/9] video: One function call less in vesafb

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Date:	Mon, 19 Jan 2015 19:30:42 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	linux-fbdev@...r.kernel.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 3/9] video: One function call less in vesafb_probe() after,
 error detection

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 19 Jan 2015 11:30:33 +0100

The iounmap() function could be called in two cases by the vesafb_probe()
function during error handling even if the passed data structure element
contained still a null pointer.

This implementation detail could be improved by adjustments for jump labels.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/video/fbdev/vesafb.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c
index 693d18e..de7cad0 100644
--- a/drivers/video/fbdev/vesafb.c
+++ b/drivers/video/fbdev/vesafb.c
@@ -303,7 +303,7 @@ static int vesafb_probe(struct platform_device *dev)
 	info->apertures = alloc_apertures(1);
 	if (!info->apertures) {
 		err = -ENOMEM;
-		goto err;
+		goto release_framebuffer;
 	}
 	info->apertures->ranges[0].base = screen_info.lfb_base;
 	info->apertures->ranges[0].size = size_total;
@@ -462,7 +462,7 @@ static int vesafb_probe(struct platform_device *dev)
 		       "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
 			vesafb_fix.smem_len, vesafb_fix.smem_start);
 		err = -EIO;
-		goto err;
+		goto release_framebuffer;
 	}
 
 	printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
@@ -492,6 +492,7 @@ static int vesafb_probe(struct platform_device *dev)
 	return 0;
 err:
 	iounmap(info->screen_base);
+release_framebuffer:
 	framebuffer_release(info);
 	release_mem_region(vesafb_fix.smem_start, size_total);
 	return err;
-- 
2.2.2

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