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From: "Govindraj.R" <govindraj.raja@ti.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>, Paul Walmsley <paul@pwsan.com>,
	Kevin Hilman <khilman@ti.com>
Cc: linux-omap@vger.kernel.org, linux-pm@lists.linux-foundation.org,
	Vishwanath Sripathy <vishwanath.bs@ti.com>,
	Partha Basak <p-basak2@ti.com>, Felipe Balbi <balbi@ti.com>,
	Santosh Shilimkar <santosh.shilimkar@ti.com>,
	Rajendra Nayak <rnayak@ti.com>, Benoit Cousson <b-cousson@ti.com>,
	Tero Kristo <t-kristo@ti.com>,
	Govindraj R <govindraj.raja@ti.com>,
	Keshava Munegowda <keshava_mgowda@ti.com>
Subject: Issue: Runtime API usage in wake-up device irq_handler during wakeup from system-wide-suspend.
Date: Fri, 26 Aug 2011 18:31:33 +0530	[thread overview]
Message-ID: <1314363693-20831-1-git-send-email-govindraj.raja@ti.com> (raw)

Hello,

During system_wide_suspend pm runtime is disabled.
I.e. __pm_runtime_disable is called from __device_suspend.
Now, if a wakeup interrupt is triggered and the wakeup device irq handler
is called even before device_resume and pm_runtime_enable happens,
the device irq_handler proceeds to enable clock with runtime API to
handle wakeup event.
 
Wouldn't this result in system wide abort since the pm_runtime is not enabled
yet from dpm_resume?
As we end up accessing regs after doing runtime get_sync.
 
Looks like this scenario is not handled currently.
Or Am I missing something here?

--
Thanks,
Govindraj.R


             reply	other threads:[~2011-08-26 13:01 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-26 13:01 Govindraj.R [this message]
2011-08-26 18:36 ` [linux-pm] Issue: Runtime API usage in wake-up device irq_handler during wakeup from system-wide-suspend Alan Stern
2011-08-27  6:30   ` Santosh
2011-08-27  6:30   ` [linux-pm] " Santosh
2011-08-27 14:01     ` Alan Stern
2011-08-27 14:49       ` Santosh
2011-08-27 19:42         ` Alan Stern
2011-09-07 15:48           ` Tero Kristo
2011-09-07 15:48           ` [linux-pm] " Tero Kristo
2011-09-07 17:59             ` Kevin Hilman
2011-09-08  4:58               ` Tero Kristo
2011-09-08  4:58               ` [linux-pm] " Tero Kristo
2011-09-08 13:51                 ` Kevin Hilman
2011-09-08 13:51                 ` Kevin Hilman
2011-09-07 17:59             ` Kevin Hilman
2011-08-27 19:42         ` Alan Stern
2011-08-27 14:49       ` Santosh
2011-08-27 14:01     ` Alan Stern
2011-08-26 18:36 ` Alan Stern
2011-08-26 20:52 ` Rafael J. Wysocki
2011-08-26 20:52 ` Rafael J. Wysocki
2011-08-26 13:01 Govindraj.R

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