lkml.org 
[lkml]   [2017]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] soc: imx: gpcv2: fix regulator deferred probe
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@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> Fixes: 03aa12629fc4 ("soc: imx: Add GPCv2 power gating driver")
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> ---
> Hi Shawn,
>
> Since this leads to a Kernel hang in v4.13-rc3, can you get this
> into v4.13 still?

Sure. But before doing that, I would like to get an ACK from Andrey on
this fix.

Shawn

\
 
 \ /
  Last update: 2017-08-03 04:51    [W:1.195 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site