linux-kernel - Re: [Bug 10030] Suspend doesn't work when SD card is inserted

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Date:	Thu, 21 Feb 2008 18:05:05 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Pierre Ossman <drzeus-mmc@...eus.cx>,
	Zdenek Kabelac <zdenek.kabelac@...il.com>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [Bug 10030] Suspend doesn't work when SD card is inserted

On Thu, 21 Feb 2008, Rafael J. Wysocki wrote:

> BTW, below is a simplified version of the patch, without the mutex protecting
> suspending_task.  I'd like to push it upstream if it looks good.

It does look good.  Go ahead and push.

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

> Please also have a look at http://bugzilla.kernel.org/show_bug.cgi?id=10030.
> There seems to be another issue related to us holding devices' semaphores.
> Namely, it looks like, when the user removes the card, a concurrent thread
> (from a workqueue) calls device_del() and blocks on the dev->sem held by
> us and then something else deadlocks with this thread.  I'll be looking into
> this tomorrow.

I've been too busy with other things to look at the activity on that 
bug report.  Tonight or tomorrow...

Alan Stern

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