RE: [PATCH 1/15] sound/soc/mxs/mxs-saif.c: add missing iounmap

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> -----Original Message-----
> From: linux-kernel-owner@xxxxxxxxxxxxxxx [mailto:linux-kernel-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Julia Lawall
> Sent: Thursday, January 12, 2012 5:55 PM
> To: Liam Girdwood
> Cc: kernel-janitors@xxxxxxxxxxxxxxx; Mark Brown; Jaroslav Kysela; Takashi Iwai;
> alsa-devel@xxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: [PATCH 1/15] sound/soc/mxs/mxs-saif.c: add missing iounmap
> 
> From: Julia Lawall <Julia.Lawall@xxxxxxx>
> 
> Add missing iounmap in error handling code, in a case where the function already
> preforms iounmap on some other execution path.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression e;
> statement S,S1;
> int ret;
> @@
> e = \(ioremap\|ioremap_nocache\)(...)
> ... when != iounmap(e)
> if (<+...e...+>) S
> ... when any
>     when != iounmap(e)
> *if (...)
>    { ... when != iounmap(e)
>      return ...; }
> ... when any
> iounmap(e);
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>
> 
> ---
>  sound/soc/mxs/mxs-saif.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c index
> 049e543..5ee0adb 100644
> --- a/sound/soc/mxs/mxs-saif.c
> +++ b/sound/soc/mxs/mxs-saif.c
> @@ -680,7 +680,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
>  		ret = -ENODEV;
>  		dev_err(&pdev->dev, "failed to get dma resource: %d\n",
>  			ret);
> -		goto failed_ioremap;
> +		goto failed_get_resource;
>  	}
>  	saif->dma_param.chan_num = dmares->start;
> 
> @@ -739,6 +739,7 @@ failed_register:
>  failed_get_irq2:
>  	free_irq(saif->irq, saif);
>  failed_get_irq1:
> +failed_get_resource:
There's already a 'failed_get_resource' there, wouldn't your change break
The original code?

BTW, I guess a better way is that you can submit a patch to change the driver
To use devm_alloc_* and it's friend routines, then we do not need to fix
Such things any more.

Regards
Dong Aisheng
>  	iounmap(saif->base);
>  failed_ioremap:
>  	release_mem_region(iores->start, resource_size(iores));
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the
> body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at
> http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/


--
To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Kernel Development]     [Kernel Announce]     [Kernel Newbies]     [Linux Networking Development]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Device Mapper]

  Powered by Linux