From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Lord <kernel@teksavvy.com>
Subject: Re: Hotplug borked after suspend/resume in Linux-3.3 ?
Date: Tue, 17 Apr 2012 21:37:35 -0400
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To: Lin Ming <ming.m.lin@intel.com>
Cc: Jeff Garzik <jgarzik@pobox.com>, Tejun Heo <htejun@gmail.com>, linux-ide@vger.kernel.org

On 12-04-17 09:29 PM, Lin Ming wrote:
>
> I'm working on the hotplug issue fix.
> 
> Before the fix is ready, here is the one-line patch.
> Could you give it a try?
..
> --- a/drivers/ata/libata-transport.c
> +++ b/drivers/ata/libata-transport.c
> @@ -294,6 +294,7 @@ int ata_tport_add(struct device *parent,
>  	device_enable_async_suspend(dev);
>  	pm_runtime_set_active(dev);
>  	pm_runtime_enable(dev);
> +	pm_runtime_forbid(dev);
>  
..

I'm rebuilding the kernel right now.. should take about 5min or less to test.