From mboxrd@z Thu Jan  1 00:00:00 1970
From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH] pata_legacy: Allow disabling of legacy PATA device
 probes on non-PCI systems
Date: Fri, 2 Dec 2016 16:24:36 +0000
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To: tedheadster <tedheadster@gmail.com>
Cc: Tejun Heo <tj@kernel.org>, Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>, linux-ide@vger.kernel.org

On Fri, 2 Dec 2016 08:37:04 -0500
tedheadster <tedheadster@gmail.com> wrote:

> Alan,
> 
> >> Alan,
> >>   on my hardware it grabbed all those interrupts, showing up in
> >> /proc/interrupts very clearly.  
> >
> > Do you have a dmesg of the boot ?
> >  
> 
> Here is the relevant dmesg information and also the /proc/interrupts results:

That's very strange. The legacy code should be seeing that no devices are
present and then dropping the controller

        /* Nothing found means we drop the port as its probably not there */

        ret = -ENODEV;
        ata_for_each_dev(dev, &ap->link, ALL) {
                if (!ata_dev_absent(dev)) {
                        legacy_host[probe->slot] = host;
                        ld->platform_dev = pdev;
                        return 0;
                }
        }
        ata_host_detach(host);


so this ought to be triggered and free up the interface and the IRQ

Alan