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Date: Fri, 5 Oct 2012 23:33:02 +0200 From: Peter Senna Tschudin <peter.senna@...il.com> To: samuel@...tiz.org Cc: irda-users@...ts.sourceforge.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org, Peter Senna Tschudin <peter.senna@...il.com> Subject: [PATCH 10/20 V2] drivers/net/irda/sh_irda.c: fix error return code From: Peter Senna Tschudin <peter.senna@...il.com> The function sh_irda_probe() return 0 for success and negative value for most of its internal tests failures. There is one exception that is error case going to err_mem_4:. For this error case, the function abort its success execution path, but returns non negative value, making it difficult for a caller function to notice the error. This patch fixes the error case that do not return negative value. This was found by Coccinelle, but the code change was made by hand. This patch is not robot generated. 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: Peter Senna Tschudin <peter.senna@...il.com> --- Change from V1: Updated commit message. See: http://www.kernelhub.org/?p=2&msg=139319 drivers/net/irda/sh_irda.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/irda/sh_irda.c b/drivers/net/irda/sh_irda.c index eb315b8..4b746d9 100644 --- a/drivers/net/irda/sh_irda.c +++ b/drivers/net/irda/sh_irda.c @@ -808,8 +808,8 @@ static int __devinit sh_irda_probe(struct platform_device *pdev) goto err_mem_4; platform_set_drvdata(pdev, ndev); - - if (request_irq(irq, sh_irda_irq, IRQF_DISABLED, "sh_irda", self)) { + err = request_irq(irq, sh_irda_irq, IRQF_DISABLED, "sh_irda", self); + if (err) { dev_warn(&pdev->dev, "Unable to attach sh_irda interrupt\n"); goto err_mem_4; } -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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