linux-kernel - [PATCH 3/6] mfd: dm355evm_msp: Return directly after a failed platform_device_alloc() in add

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Date:	Sun, 26 Jun 2016 15:48:48 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Lee Jones <lee.jones@...aro.org>, Tony Lindgren <tony@...mide.com>,
	linux-omap@...r.kernel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 3/6] mfd: dm355evm_msp: Return directly after a failed
 platform_device_alloc() in add_child()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 26 Jun 2016 13:40:35 +0200

The platform_device_put() function was called in one case by the
add_child() function during error handling even if the passed
variable "pdev" contained a null pointer.
Return directly in this case.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/mfd/dm355evm_msp.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/dm355evm_msp.c b/drivers/mfd/dm355evm_msp.c
index 14661ec..270e19c 100644
--- a/drivers/mfd/dm355evm_msp.c
+++ b/drivers/mfd/dm355evm_msp.c
@@ -199,11 +199,8 @@ static struct device *add_child(struct i2c_client *client, const char *name,
 	int			status;
 
 	pdev = platform_device_alloc(name, -1);
-	if (!pdev) {
-		dev_dbg(&client->dev, "can't alloc dev\n");
-		status = -ENOMEM;
-		goto err;
-	}
+	if (!pdev)
+		return ERR_PTR(-ENOMEM);
 
 	device_init_wakeup(&pdev->dev, can_wakeup);
 	pdev->dev.parent = &client->dev;
-- 
2.9.0