linux-kernel - Re: [alsa-devel] [PATCH 1/15] sound/soc/mxs/mxs-saif.c: add missing iounmap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 26 Jan 2012 14:51:35 +0100
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	Julia Lawall <julia.lawall@...6.fr>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	Takashi Iwai <tiwai@...e.de>,
	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dong Aisheng-B29396 <B29396@...escale.com>,
	Liam Girdwood <lrg@...com>
Subject: Re: [alsa-devel] [PATCH 1/15] sound/soc/mxs/mxs-saif.c: add
 missing iounmap

Julia,

>  	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> @@ -663,18 +663,11 @@ static int mxs_saif_probe(struct platform_device *pdev)
>  		goto failed_get_resource;
>  	}
> 
> -	if (!request_mem_region(iores->start, resource_size(iores),
> -				"mxs-saif")) {
> -		dev_err(&pdev->dev, "request_mem_region failed\n");
> -		ret = -EBUSY;
> -		goto failed_get_resource;
> -	}
> -
> -	saif->base = ioremap(iores->start, resource_size(iores));
> +	saif->base = devm_request_and_ioremap(&pdev->dev, iores);

You can skip checking 'iores', too. I also did that in the example, but
a lot of people seem to miss it. Where did you get the information how
to use devm_request_and_ioremap? I probably need to spread the word even
more...

Thanks,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Download attachment "signature.asc" of type "application/pgp-signature" (199 bytes)