linux-kernel - [PATCH 12/14] drivers/spi/spi-coldfire-qspi.c: fix error return code

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Date:	Sun, 19 Aug 2012 10:44:25 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	kernel-janitors@...r.kernel.org,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH 12/14] drivers/spi/spi-coldfire-qspi.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/spi/spi-coldfire-qspi.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c
index b2d4b9e..7889796 100644
--- a/drivers/spi/spi-coldfire-qspi.c
+++ b/drivers/spi/spi-coldfire-qspi.c
@@ -462,6 +462,7 @@ static int __devinit mcfqspi_probe(struct platform_device *pdev)
 	pdata = pdev->dev.platform_data;
 	if (!pdata) {
 		dev_dbg(&pdev->dev, "platform data is missing\n");
+		status = -EINVAL;
 		goto fail4;
 	}
 	master->bus_num = pdata->bus_num;

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