linux-kernel - [PATCH 5/14] drivers/power/ab8500_charger.c: fix error return code

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Message-Id: <1345365870-29831-4-git-send-email-Julia.Lawall@lip6.fr>
Date:	Sun, 19 Aug 2012 10:44:19 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Anton Vorontsov <cbou@...l.ru>
Cc:	kernel-janitors@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5/14] drivers/power/ab8500_charger.c: fix error return code

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

Initialize return variable before exiting on an error path.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/power/ab8500_charger.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index d4f0c98..c2ef947 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -2614,6 +2614,7 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
 		create_singlethread_workqueue("ab8500_charger_wq");
 	if (di->charger_wq == NULL) {
 		dev_err(di->dev, "failed to create work queue\n");
+		ret = -ENOMEM;
 		goto free_device_info;
 	}
 

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