linux-kernel - Re: [PATCH v2] [SCSI] scsi_pm: set device runtime state before parent suspended

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Message-ID: <Pine.LNX.4.44L0.1207061023350.28821-100000@netrider.rowland.org>
Date:	Fri, 6 Jul 2012 10:24:38 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Lin Ming <ming.m.lin@...el.com>
cc:	James Bottomley <JBottomley@...allels.com>,
	<linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] [SCSI] scsi_pm: set device runtime state before parent
 suspended

On Fri, 6 Jul 2012, Lin Ming wrote:

> There is a race in scsi_bus_resume_common when set device's runtime
> state to active after pm_runtime_put_sync(dev->parent).
> 
> Parent device may have been suspended so pm_runtime_set_active(dev) will
> fail with -EBUSY.
> 
> Signed-off-by: Lin Ming <ming.m.lin@...el.com>

Acked-by: Alan Stern <stern@...land.harvard.edu>

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