linux-kernel - [PATCH 3/8] soc: ti: knav_qmss

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Message-Id: <1419872683-32709-4-git-send-email-Julia.Lawall@lip6.fr>
Date:	Mon, 29 Dec 2014 18:04:38 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Santosh Shilimkar <ssantosh@...nel.org>
Cc:	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 3/8] soc: ti: knav_qmss_queue: fix error return code

Return a negative error code on failure.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret = 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/soc/ti/knav_qmss_queue.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c
index 8e6a95d..d41c3bc 100644
--- a/drivers/soc/ti/knav_qmss_queue.c
+++ b/drivers/soc/ti/knav_qmss_queue.c
@@ -1759,6 +1759,7 @@ static int knav_queue_probe(struct platform_device *pdev)
 	regions =  of_get_child_by_name(node, "descriptor-regions");
 	if (!regions) {
 		dev_err(dev, "descriptor-regions not specified\n");
+		ret = -ENODEV;
 		goto err;
 	}
 	ret = knav_queue_setup_regions(kdev, regions);

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