lkml.org 
[lkml]   [2010]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/2] sound/soc/davinci/davinci-mcasp.c: Return error code in failure
From
Date
On Mon, 2010-10-18 at 16:11 +0200, Julia Lawall wrote:
> In this code, 0 is returned on failure, even though other
> failures return -ENOMEM or other similar values.
>
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @a@
> identifier alloc;
> identifier ret;
> constant C;
> expression x;
> @@
>
> x = alloc(...);
> if (x == NULL) { <+... \(ret = -C; \| return -C; \) ...+> }
>
> @@
> identifier f, a.alloc;
> expression ret;
> expression x,e1,e2,e3;
> @@
>
> ret = 0
> ... when != ret = e1
> *x = alloc(...)
> ... when != ret = e2
> if (x == NULL) { ... when != ret = e3
> return ret;
> }
> // </smpl>
>
> Signed-off-by: Julia Lawall <julia@diku.dk>
>
> ---
> Another call to platform_get_resource in the same function returns -ENODEV
> on error, so I have used that value.
>
> sound/soc/davinci/davinci-mcasp.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
> index c8e97dc..86918ee 100644
> --- a/sound/soc/davinci/davinci-mcasp.c
> +++ b/sound/soc/davinci/davinci-mcasp.c
> @@ -898,6 +898,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
> res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> if (!res) {
> dev_err(&pdev->dev, "no DMA resource\n");
> + ret = -ENODEV;
> goto err_release_region;
> }
>
> @@ -912,6 +913,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
> res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> if (!res) {
> dev_err(&pdev->dev, "no DMA resource\n");
> + ret = -ENODEV;
> goto err_release_region;
> }
>
>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
--
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk



\
 
 \ /
  Last update: 2010-10-18 16:13    [W:0.032 / U:0.340 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site