soc: imx: gpcv2: Do not pass static memory as platform data
authorAndrey Smirnov <andrew.smirnov@gmail.com>
Tue, 10 Apr 2018 18:32:09 +0000 (11:32 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 3 Aug 2018 05:50:40 +0000 (07:50 +0200)
commit6cfd0d3c627f845ca6bcc560a57c0bb2632e4ebf
treeb89ca1853df34f6ddb174663df318dbf5f071fd6
parent62079c8371aaa08f072a3e41628e753f9696d6df
soc: imx: gpcv2: Do not pass static memory as platform data

[ Upstream commit 050f810e238f268670f14a8f8b793ba2dbf2e92f ]

Platform device core assumes the ownership of dev.platform_data as
well as that it is dynamically allocated and it will try to kfree it
as a part of platform_device_release(). Change the code to use
platform_device_add_data() n instead of a pointer to a static memory
to avoid causing a BUG() when calling platform_device_put().

The problem can be reproduced by artificially enabling the error path
of platform_device_add() call (around line 357).

Note that this change also allows us to constify imx7_pgc_domains,
since we no longer need to be able to modify it.

Cc: Stefan Agner <stefan@agner.ch>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/soc/imx/gpcv2.c