linux-kernel - Re: [PATCH 1/2] ASoC: rockchip: Add machine driver for max98090 codec

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, 16 Jul 2015 16:15:16 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Mark Brown <broonie@...nel.org>
Cc:	Xing Zheng <zhengxing@...k-chips.com>, dgreid@...omium.org,
	dianders@...omium.org, heiko@...ech.de, sonnyrao@...omium.org,
	linux-rockchip@...ts.infradead.org,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] ASoC: rockchip: Add machine driver for max98090
 codec

On do, 2015-07-16 at 13:55 +0100, Mark Brown wrote:
> No, in that case you've not understood what the MODULE_ALIAS is
> for.  It's there so that userspace knows which module to load if it 
> gets
> a device with no driver, it goes in the driver not in the code
> registering the device.

That's exactly how I understood MODULE_ALIAS() to work.

And it works, in short, because a platform device fires a
"MODALIAS=platform:[...]" uevent when it's created. And userspace uses
that uevent to load the module carrying that alias.

Let's put it this was. If one does
    sudo find /sys -perm -o=r -name uevent -exec grep -H MODALIAS=platform: {} \;

or
    sudo find /sys -perm -o=r -name modalias -exec grep -H platform: {} \;

(both lists should be similar)

on the systems this patch is targeting, will
   platform:rockchip-snd-max98090

then show up?

Thanks,


Paul Bolle
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/