From mboxrd@z Thu Jan  1 00:00:00 1970
From: shawnguo@kernel.org (Shawn Guo)
Date: Mon, 14 Aug 2017 13:35:12 +0800
Subject: [PATCH] soc: imx: gpcv2: fix regulator deferred probe
In-Reply-To: <4546b5193b819ad78a9663baa41be836@agner.ch>
References: <20170802195129.20442-1-stefan@agner.ch>
 <20170805031321.GP31819@dragon>
 <4546b5193b819ad78a9663baa41be836@agner.ch>
Message-ID: <20170814053510.GI31819@dragon>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Sun, Aug 13, 2017 at 10:12:13PM -0700, Stefan Agner wrote:
> Hi Shawn,
> 
> On 2017-08-04 20:13, Shawn Guo wrote:
> > On Wed, Aug 02, 2017 at 12:51:29PM -0700, Stefan Agner wrote:
> >> If a regulator requests a deferred probe, the power domain gets
> >> initialized twice. This leads to a list double add (without
> >> list debugging the kernel hangs due to the double add later):
> >>
> >>   WARNING: CPU: 0 PID: 19 at lib/list_debug.c:31 __list_add_valid+0xbc/0xc4
> >>   list_add double add: new=c1229754, prev=c12383b4, next=c1229754.
> >>
> >> Initialize the power domain after we get the regulator. Also do
> >> not print an error in case the regulator defers probing.
> >>
> >> Cc: Fabio Estevam <fabio.estevam@nxp.com>
> >> Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
> >> Cc: linux-arm-kernel at lists.infradead.org
> >> Cc: linux-kernel at vger.kernel.org
> >> Fixes: 03aa12629fc4 ("soc: imx: Add GPCv2 power gating driver")
> >> Signed-off-by: Stefan Agner <stefan@agner.ch>
> > 
> > Applied, thanks.
> 
> As of 4.13-rc5 this did not make it upstream yet, I guess still on its
> way?

Yes, Stefan. It's on the way to arm-soc [1], but not yet responded.

Shawn

[1] https://www.spinics.net/lists/arm-kernel/msg598634.html