soc: imx: gpcv2: fix regulator deferred probe
authorStefan Agner <stefan@agner.ch>
Wed, 2 Aug 2017 19:51:29 +0000 (12:51 -0700)
committerShawn Guo <shawnguo@kernel.org>
Sat, 5 Aug 2017 03:12:20 +0000 (11:12 +0800)
commit9e01e2d56db23485a75864b6aeee8e443f024ddb
treee2b2fae8eb01460bea5535b88c7e226b41227c37
parent05969566e6d64113a861adc6c17cbba685c640b3
soc: imx: gpcv2: fix regulator deferred probe

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>
Acked-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Tested-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
drivers/soc/imx/gpcv2.c