linux-kernel - [PATCH 4/14] drivers/power/bq27x00_battery.c: fix error return code

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Message-Id: <1345365870-29831-5-git-send-email-Julia.Lawall@lip6.fr>
Date:	Sun, 19 Aug 2012 10:44:20 +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 4/14] drivers/power/bq27x00_battery.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/bq27x00_battery.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index 181ddec..5860d4d 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -814,7 +814,8 @@ static int bq27x00_battery_probe(struct i2c_client *client,
 	di->bat.name = name;
 	di->bus.read = &bq27x00_read_i2c;
 
-	if (bq27x00_powersupply_init(di))
+	retval = bq27x00_powersupply_init(di);
+	if (retval)
 		goto batt_failed_3;
 
 	i2c_set_clientdata(client, di);

--
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