linux-kernel - Re: [PATCH] i2c: mux: Use subsys_initcall for the i2c-arb-gpio-challenge

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] [day] [month] [year] [list]

Message-ID: <20140521102653.GK2708@katana>
Date:	Wed, 21 May 2014 12:26:53 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Naveen Krishna Chatradhi <ch.naveen@...sung.com>
Cc:	linux-i2c@...r.kernel.org, naveenkrishna.ch@...il.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, sjg@...omium.org,
	grundler@...omium.org, linux-kernel@...r.kernel.org,
	cpgs@...sung.com, broonie@...nel.org,
	Doug Anderson <dianders@...omium.org>
Subject: Re: [PATCH] i2c: mux: Use subsys_initcall for the
 i2c-arb-gpio-challenge

On Thu, Apr 24, 2014 at 08:35:22PM +0530, Naveen Krishna Chatradhi wrote:
> From: Doug Anderson <dianders@...omium.org>
> 
> Since many drivers rely on FETs that live behind this arbitrator, they
> can't successfully probe until after the arbitrator comes up.  They
> ought to handle things properly with EPROBE_DEFER and still work, but
> that has some downsides:
> 
> 1. Those drivers don't come up till later in the boot process.  That
>    really not so nice for the LCD--we want that to init early.
> 2. Some drivers have bugs and don't handle EPROBE_DEFER.  Those
>    drivers should be fixed but not all of them have been fixed yet.
>    HDMI is one example since DRM doesn't really have good support for
>    deferring probes.
> 
> With this change We end up using the same init level as the main i2c bus.
> 
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> Reviewed-on: https://gerrit.chromium.org/gerrit/57007
> Reviewed-by: Simon Glass <sjg@...omium.org>
> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@...sung.com>

Same here. Unless we have a clear understanding that this is the only
acceptable solution in mainline, this is really an out-of-tree patch.


Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)