linux-kernel - Re: [PATCH 1/3] pinctrl: cherryview: Serialize register access in suspend and resume hooks

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Date:   Fri, 4 Nov 2016 17:28:21 +0200
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Christian Steiner <christian.steiner@...look.de>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] pinctrl: cherryview: Serialize register access in
 suspend and resume hooks

On Fri, Nov 04, 2016 at 04:15:59PM +0100, Linus Walleij wrote:
> On Fri, Nov 4, 2016 at 4:12 PM, Linus Walleij <linus.walleij@...aro.org> wrote:
> > On Mon, Oct 31, 2016 at 3:57 PM, Mika Westerberg
> > <mika.westerberg@...ux.intel.com> wrote:
> >
> >> If async suspend is enabled, the driver may access registers concurrently
> >> with another instance which may fail because of the bug in Cherryview GPIO
> >> hardware. Prevent this by taking the shared lock while accessing the
> >> hardware in suspend and resume hooks.
> >>
> >> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> >
> > Patch applied.
> 
> Mika should this and patch 2/3 be tagged for stable?

Yes, I think they should.