linux-kernel - [PATCH] regulator: max1586 - fix a memory leak in max1586_pmic

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Message-Id: <1281072795.24426.3.camel@mola>
Date:	Fri, 06 Aug 2010 13:33:15 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Liam Girdwood <lrg@...mlogic.co.uk>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: [PATCH] regulator: max1586 - fix a memory leak in
	max1586_pmic_remove()

In max1586_pmic_probe(), we allocate memory for max1586.
In max1586_pmic_remove(), current implementation only free rdev
which is a member of struct max1586_data.
Thus, there is a small memory leak when we unload the module.

This patch fixes the memory leak by passing max1586 to i2c clientdata,
and properly kfree(max1586) in max1586_pmic_remove().

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/regulator/max1586.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index 2b54d9d..8867c27 100644
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -223,7 +223,7 @@ static int __devinit max1586_pmic_probe(struct i2c_client *client,
 		}
 	}
 
-	i2c_set_clientdata(client, rdev);
+	i2c_set_clientdata(client, max1586);
 	dev_info(&client->dev, "Maxim 1586 regulator driver loaded\n");
 	return 0;
 
@@ -238,13 +238,13 @@ out:
 
 static int __devexit max1586_pmic_remove(struct i2c_client *client)
 {
-	struct regulator_dev **rdev = i2c_get_clientdata(client);
+	struct max1586_data *max1586 = i2c_get_clientdata(client);
 	int i;
 
 	for (i = 0; i <= MAX1586_V6; i++)
-		if (rdev[i])
-			regulator_unregister(rdev[i]);
-	kfree(rdev);
+		if (max1586->rdev[i])
+			regulator_unregister(max1586->rdev[i]);
+	kfree(max1586);
 
 	return 0;
 }
-- 
1.5.4.3



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