From: Kevin Hilman <khilman@ti.com>
To: Vitaly Wool <vitalywool@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
linux-mmc@vger.kernel.org, linux-wireless@vger.kernel.org,
Ido Yariv <ido@wizery.com>,
linux-pm@lists.linux-foundation.org,
Johannes Berg <johannes@sipsolutions.net>
Subject: Re: [linux-pm] subtle pm_runtime_put_sync race and sdio functions
Date: Thu, 27 Jan 2011 10:54:19 -0800 [thread overview]
Message-ID: <87bp32npno.fsf@ti.com> (raw)
In-Reply-To: <AANLkTikH0aHQNzShAYQfPLPg4C_0HS_pWEqbJJ4aHZgm@mail.gmail.com> (Vitaly Wool's message of "Thu, 27 Jan 2011 19:20:10 +0100")
Vitaly Wool <vitalywool@gmail.com> writes:
> Hi Kevin,
>
>> Therefore, what is ideally needed is the ability for A's suspend to
>> simply call pm_runtime_suspend() so the subsystem can do the work.
>> However, since runtime transitions are locked out by this time, that
>> doesn't work. IOW, what is needed is a way for a system suspend to say
>> "please finish the runtime suspend that was already requested."
>>
>> What I've done to work around this in driver A is to manually check
>> pm_runtime_suspended() and directly call the subsystem's runtime
>> suspend/resume (patch below[1]. NOTE, I've used the _noirq methods to
>> ensure device A is available when device B needs it.)
>
> suppose this driver runs on a platform that has runtime PM disabled.
> How is it going to work then?
>
Then pm_runtime_suspended() will be false, and the bus methods will
suspend the device.
Kevin
next prev parent reply other threads:[~2011-01-27 18:54 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 23:37 subtle pm_runtime_put_sync race and sdio functions Ohad Ben-Cohen
2010-12-10 0:00 ` [linux-pm] " Rafael J. Wysocki
2010-12-10 17:24 ` Alan Stern
2010-12-10 22:01 ` Rafael J. Wysocki
2010-12-10 23:02 ` Ohad Ben-Cohen
2010-12-10 22:59 ` Ohad Ben-Cohen
2010-12-11 1:17 ` Ohad Ben-Cohen
2010-12-11 14:53 ` Alan Stern
2010-12-11 14:50 ` Alan Stern
2010-12-18 13:29 ` [linux-pm] " Ohad Ben-Cohen
2010-12-18 14:16 ` David Vrabel
2010-12-18 15:12 ` Ohad Ben-Cohen
2010-12-18 15:07 ` Rafael J. Wysocki
2010-12-18 16:00 ` Ohad Ben-Cohen
2010-12-18 16:40 ` Johannes Berg
[not found] ` <1292690407.3653.2.camel-8upI4CBIZJIJvtFkdXX2HixXY32XiHfO@public.gmane.org>
2010-12-18 19:08 ` Ohad Ben-Cohen
2010-12-18 21:30 ` Alan Stern
2010-12-18 22:57 ` Rafael J. Wysocki
2010-12-18 22:52 ` Rafael J. Wysocki
2010-12-18 21:29 ` Alan Stern
2010-12-18 22:50 ` Rafael J. Wysocki
[not found] ` <AANLkTin23vbbA7+UDzh=v060HbkLMrJjB38cs+AWScPJ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-18 22:47 ` Rafael J. Wysocki
[not found] ` <201012182347.08635.rjw-KKrjLPT3xs0@public.gmane.org>
2010-12-19 7:48 ` Ohad Ben-Cohen
2010-12-19 10:22 ` Rafael J. Wysocki
2010-12-20 3:37 ` Alan Stern
2010-12-20 21:17 ` Rafael J. Wysocki
[not found] ` <201012202217.09374.rjw-KKrjLPT3xs0@public.gmane.org>
2010-12-21 0:57 ` Alan Stern
2010-12-21 21:31 ` Rafael J. Wysocki
[not found] ` <201012212231.57420.rjw-KKrjLPT3xs0@public.gmane.org>
2010-12-22 1:42 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1012212032590.11252-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-12-22 12:29 ` Rafael J. Wysocki
2011-01-26 23:28 ` Kevin Hilman
2011-01-27 18:13 ` [linux-pm] " Alan Stern
[not found] ` <Pine.LNX.4.44L0.1101271158530.2090-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-01-27 19:22 ` Kevin Hilman
2011-01-27 19:49 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1101271439020.2090-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-01-27 20:15 ` Kevin Hilman
[not found] ` <87tyguje7j.fsf-l0cyMroinI0@public.gmane.org>
2011-01-27 22:18 ` Vitaly Wool
2011-01-27 23:21 ` Rafael J. Wysocki
2011-01-27 23:49 ` Kevin Hilman
2011-01-27 23:11 ` Rafael J. Wysocki
[not found] ` <87k4hrtfcb.fsf-l0cyMroinI0@public.gmane.org>
2011-01-27 18:20 ` Vitaly Wool
2011-01-27 18:54 ` Kevin Hilman [this message]
2010-12-21 22:23 ` Kevin Hilman
2010-12-22 1:48 ` Alan Stern
2010-12-23 7:51 ` Ohad Ben-Cohen
2010-12-23 16:03 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1012231055440.5617-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-12-25 7:34 ` Ohad Ben-Cohen
[not found] ` <AANLkTi=aHU57xDq+-DWrN2sJsAwx_9bZ_ofy1rOmp0VH-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-25 16:21 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1012251046060.5079-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-12-25 20:58 ` Ohad Ben-Cohen
2010-12-25 21:50 ` Vitaly Wool
2010-12-26 5:27 ` Ohad Ben-Cohen
[not found] ` <AANLkTimj0E3Rz_8WQrU4wGg3ONyXzkUT9+U3Xqz7Cq0X-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-25 21:54 ` Vitaly Wool
2010-12-26 2:48 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1012252041260.10725-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-12-26 5:55 ` Ohad Ben-Cohen
2010-12-26 11:45 ` Rafael J. Wysocki
[not found] ` <201012261245.29680.rjw-KKrjLPT3xs0@public.gmane.org>
2010-12-26 12:43 ` Ohad Ben-Cohen
2010-12-26 18:35 ` Rafael J. Wysocki
2010-12-28 19:11 ` Ohad Ben-Cohen
[not found] ` <AANLkTimHHN+GesyhR6Jjnm771XLhn=inn=vrSk=mT6Mh-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-28 19:21 ` Rafael J. Wysocki
2010-12-28 19:34 ` Ohad Ben-Cohen
2010-12-28 20:36 ` Rafael J. Wysocki
2010-12-26 14:53 ` Ohad Ben-Cohen
2010-12-26 18:37 ` Rafael J. Wysocki
2010-12-28 19:15 ` Ohad Ben-Cohen
[not found] ` <AANLkTinewad6YxXvn5gnJQ+HJn41Sg96319GQn9KRKWj-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-28 20:04 ` Rafael J. Wysocki
[not found] ` <201012282104.06232.rjw-KKrjLPT3xs0@public.gmane.org>
2010-12-28 20:41 ` Ohad Ben-Cohen
[not found] ` <AANLkTinyKfwcZLD5D4rdF6OpQqr79F==GRjAMBjjbupW-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-26 17:00 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1012261050050.18773-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-12-28 19:04 ` Ohad Ben-Cohen
2010-12-28 21:46 ` Alan Stern
2010-12-29 6:34 ` Ohad Ben-Cohen
2010-12-30 4:25 ` Alan Stern
2010-12-29 8:01 ` Ohad Ben-Cohen
[not found] ` <AANLkTi=QT1thWxy94=imJhbbcXQ1CD36=PnkAyaaA6Hj-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-12-30 4:30 ` Alan Stern
2010-12-18 21:20 ` Alan Stern
2010-12-18 23:03 ` Rafael J. Wysocki
2010-12-19 10:00 ` Ohad Ben-Cohen
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