linux-kernel - [PATCH 3.10 24/86] mfd: 88pm860x: Fix I2C device resource leak on regmap init fail

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Message-Id: <20140504154143.677817576@linuxfoundation.org>
Date:	Sun,  4 May 2014 11:40:59 -0400
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 3.10 24/86] mfd: 88pm860x: Fix I2C device resource leak on regmap init fail

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Krzysztof Kozlowski <k.kozlowski@...sung.com>

commit a7ab1c8b261305af583ce26bb4a14f555fdaa73e upstream.

During probe the driver allocates dummy I2C device for companion chip
and then allocates a regmap for it. If regmap_init_i2c() fails then the
I2C driver (allocated with i2c_new_dummy()) is not freed and this
resource leaks.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mfd/88pm860x-core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mfd/88pm860x-core.c
+++ b/drivers/mfd/88pm860x-core.c
@@ -1190,6 +1190,7 @@ static int pm860x_probe(struct i2c_clien
 			ret = PTR_ERR(chip->regmap_companion);
 			dev_err(&chip->companion->dev,
 				"Failed to allocate register map: %d\n", ret);
+			i2c_unregister_device(chip->companion);
 			return ret;
 		}
 		i2c_set_clientdata(chip->companion, chip);


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