From: Pavel Machek <pavel@ucw.cz>
To: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Alan Stern <stern@rowland.harvard.edu>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-pm@vger.kernel.org, Len Brown <len.brown@intel.com>,
linux-kernel@vger.kernel.org,
Thierry Reding <thierry.reding@gmail.com>
Subject: Re: [PATCH v3] PM / sleep: prohibit devices probing during suspend/hibernation
Date: Sun, 15 Nov 2015 16:46:12 +0100 [thread overview]
Message-ID: <20151115154612.GA20981@amd> (raw)
In-Reply-To: <1447148554-18401-1-git-send-email-grygorii.strashko@ti.com>
On Tue 2015-11-10 11:42:34, Grygorii Strashko wrote:
> It is unsafe [1] if probing of devices will happen during suspend or
> hibernation and system behavior will be unpredictable in this case.
> So, let's prohibit device's probing in dpm_prepare() and defer their
> probing instead. The normal behavior will be restored in
> dpm_complete().
>
> This patch introduces new DD core APIs:
> device_block_probing()
> It will disable probing of devices and defer their probes instead.
> device_unblock_probing()
> It will restore normal behavior and trigger re-probing of deferred
> devices.
>
> [1] https://lkml.org/lkml/2015/9/11/554
> Cc: Alan Stern <stern@rowland.harvard.edu>
> Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2015-11-15 15:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-10 9:42 [PATCH v3] PM / sleep: prohibit devices probing during suspend/hibernation Grygorii Strashko
2015-11-15 15:46 ` Pavel Machek [this message]
2015-12-02 2:15 ` Rafael J. Wysocki
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