linux-kernel - Re: [PATCH 1/2] clk: Fix error handling in fixed clock hardware type register fn

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:	Wed, 21 Mar 2012 12:56:21 -0700
From:	"Turquette, Mike" <mturquette@...com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Saravana Kannan <skannan@...eaurora.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Andrew Lunn <andrew@...n.ch>,
	Grant Likely <grant.likely@...retlab.ca>,
	Jamie Iles <jamie@...ieiles.com>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Magnus Damm <magnus.damm@...il.com>,
	Deepak Saxena <dsaxena@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergman <arnd.bergmann@...aro.org>,
	linux-arm-msm@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Richard Zhao <richard.zhao@...aro.org>,
	Shawn Guo <shawn.guo@...escale.com>,
	Paul Walmsley <paul@...an.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-kernel@...r.kernel.org,
	Amit Kucheria <amit.kucheria@...aro.org>
Subject: Re: [PATCH 1/2] clk: Fix error handling in fixed clock hardware type
 register fn

On Wed, Mar 21, 2012 at 2:07 AM, Russell King - ARM Linux
<linux@....linux.org.uk> wrote:
> On Tue, Mar 20, 2012 at 10:45:36PM -0700, Turquette, Mike wrote:
>> IIRC, that discussion was with respect to the .parent member of struct
>> clk.  It was decided that having .parent = NULL does not imply that a
>> clock is a root clock, but instead we rely on the CLK_IS_ROOT flag.  I
>> can't think of any other instance where a NULL clk when returned from
>> a registration function would be useful.
>
> No.  What I've been saying is that in _drivers_ which use clk_get(),
> the error range is defined by IS_ERR(clk).  Every other value of
> clk must be assumed by the driver to be valid, no ifs or buts.

Drivers certainly might make calls to clk_register_foo, despite it
being outside of the traditional clock api.  For the sake of
consistency I'll convert the clk_register_foo functions to return
error codes.

Regards,
Mike
--
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/