linux-kernel - Re: [PATCH 1/5] i2c: omap: fix spurious IRQs: disable/enable IRQ at INTC when idle

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: <20130619205607.GB6804@arwen.pp.htv.fi>
Date:	Wed, 19 Jun 2013 23:56:07 +0300
From:	Felipe Balbi <balbi@...com>
To:	Kevin Hilman <khilman@...aro.org>
CC:	<balbi@...com>, Grygorii Strashko <grygorii.strashko@...com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Tony Lindgren <tony@...mide.com>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-i2c@...r.kernel.org>, Nishanth Menon <nm@...com>
Subject: Re: [PATCH 1/5] i2c: omap: fix spurious IRQs: disable/enable IRQ at
 INTC when idle

Hi,

On Wed, Jun 19, 2013 at 01:01:28PM -0700, Kevin Hilman wrote:
> Felipe Balbi <balbi@...com> writes:
> 
> [...]
> 
> > If you have 200 pm_runtime_get() followed by 200 pm_runtime_put() (put
> > is called only after 200 gets, no put-get ping-pong), your
> > ->runtime_resume() gets called once, your ->runtime_suspend() gets
> > called once but your ->runtime_idle() will get called 200 times.
> 
> No. The driver's ->runtime_idle() will only be called when the usecount
> goes to zero.

Indeed, just re-read the code.

-- 
balbi

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