linux-kernel - Re: [PATCH] pata_rdc: parallel scanning needs an extra locking

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Date:	Thu, 13 Oct 2011 18:08:31 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pata_rdc: parallel scanning needs an extra locking

Alan Cox wrote:

> On Thu, 13 Oct 2011 16:06:04 +0200
> Bartlomiej Zolnierkiewicz <bzolnier@...il.com> wrote:
> 
> > From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> > Subject: [PATCH] pata_rdc: parallel scanning needs an extra locking
> > 
> > This is similar change as commit 60c3be3 ("ata_piix: parallel scanning
> > on PATA needs an extra locking") for ata_piix host driver.
> 
> Again has anyone verified with the vendor that the RDC can support
> parallel scanning ?

Upstream has always used it:

commit 6b406782ad0408f9cb480c2e1b543d194e8206d0
Author: Alan Cox <alan@...ux.intel.com>
Date:   Wed Jun 24 18:29:44 2009 +0100

    [libata] Add pata_rdc driver for RDC ATA devices
    
    From: Alan Cox <alan@...ux.intel.com>
    
    Signed-off-by: Alan Cox <alan@...ux.intel.com>
    Signed-off-by: Jeff Garzik <jgarzik@...hat.com>
...
+
+       host->flags |= ATA_HOST_PARALLEL_SCAN;
+
...

My patch only adds needed locking.
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