From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: linux-sh@vger.kernel.org
Cc: Linux PM mailing list <linux-pm@lists.linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 0/2 v2] sh-sci / PM: Fix problem with runtime PM callbacks run with interrupts off
Date: Sun, 21 Aug 2011 21:09:30 +0200 [thread overview]
Message-ID: <201108212109.30399.rjw__4707.80957625738$1313954002$gmane$org@sisk.pl> (raw)
In-Reply-To: <201108202131.19479.rjw@sisk.pl>
Hi,
> The sh-sci driver uses pm_runtime_get/put_sync() in such a way
> that they may be run with interrupts off and cause the (recently
> added) might_sleep_if() to trigger in rpm_suspend/resume().
>
> To avoid that, it's necessary to set the SCI device's power.irq_safe
> flag to indicate that it's runtime PM callbacks may be executed with
> interrupts off safely. However, the sh-sci driver needs to be able to
> clear that flag sometimes, so a new runtime PM helper for doing that
> is needed.
The previous version of this patchset was not very good as Alan pointed out,
so hopefully this one will be better.
[1/2] - Change PM subsys_data lock type into spinlock.
[2/2] - Make sh-sci use power.irq_safe to indicate that runtime PM callbacks
may be run with interrupts off.
Thanks,
Rafael
next prev parent reply other threads:[~2011-08-21 19:09 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-20 19:31 [PATCH 0/2] sh-sci / PM: Fix problem with runtime PM callbacks run with interrupts off Rafael J. Wysocki
2011-08-20 19:31 ` Rafael J. Wysocki
2011-08-20 19:32 ` [PATCH 1/2] PM / Runtime: Introduce pm_runtime_irq_unsafe() Rafael J. Wysocki
2011-08-20 19:32 ` Rafael J. Wysocki
2011-08-21 14:55 ` [linux-pm] " Alan Stern
2011-08-21 14:55 ` Alan Stern
2011-08-21 18:09 ` Rafael J. Wysocki
2011-08-21 18:09 ` [linux-pm] " Rafael J. Wysocki
2011-08-21 18:09 ` Rafael J. Wysocki
2011-08-21 14:55 ` Alan Stern
2011-08-20 19:32 ` Rafael J. Wysocki
2011-08-20 19:33 ` [PATCH 2/2] sh-sci / PM: Use power.irq_safe Rafael J. Wysocki
2011-08-20 19:33 ` Rafael J. Wysocki
2011-08-20 19:33 ` Rafael J. Wysocki
2011-08-21 19:09 ` Rafael J. Wysocki [this message]
2011-08-21 19:09 ` [PATCH 0/2 v2] sh-sci / PM: Fix problem with runtime PM callbacks run with interrupts off Rafael J. Wysocki
2011-08-21 19:09 ` Rafael J. Wysocki
2011-08-21 19:10 ` [PATCH 1/2 v2] PM: Change PM subsys_data lock type into spinlock Rafael J. Wysocki
2011-08-21 19:10 ` Rafael J. Wysocki
2011-08-22 6:18 ` [Replacement][PATCH 1/2 v2] PM: Use spinlock instead of mutex in clock management functions Rafael J. Wysocki
2011-08-22 6:18 ` Rafael J. Wysocki
2011-08-22 6:18 ` Rafael J. Wysocki
2011-08-21 19:10 ` [PATCH 1/2 v2] PM: Change PM subsys_data lock type into spinlock Rafael J. Wysocki
2011-08-21 19:11 ` [PATCH 2/2 v2] sh-sci / PM: Use power.irq_safe Rafael J. Wysocki
2011-08-21 19:11 ` Rafael J. Wysocki
2011-08-24 5:33 ` Paul Mundt
2011-08-24 5:33 ` Paul Mundt
2011-08-24 20:52 ` Rafael J. Wysocki
2011-08-24 20:52 ` Rafael J. Wysocki
2011-08-25 1:33 ` Paul Mundt
2011-08-25 1:33 ` Paul Mundt
2011-08-25 1:33 ` Paul Mundt
2011-08-24 20:52 ` Rafael J. Wysocki
2011-08-24 5:33 ` Paul Mundt
2011-08-21 19:11 ` Rafael J. Wysocki
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