Christophe Leroy bb0a300f18 powerpc/sysdev/simple_gpio: Fix oops in gpio save_regs function
commit 6f553912eedafae13ff20b322a65e471fe7f5236 upstream.

of_mm_gpiochip_add_data() generates an oops for NULL pointer dereference.

of_mm_gpiochip_add_data() calls mm_gc->save_regs() before
setting the data, therefore ->save_regs() cannot use gpiochip_get_data()

Fixes: 937daafca774 ("powerpc: simple-gpio: use gpiochip data pointer")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-14 15:06:03 +02:00
..
2017-05-25 15:44:47 +02:00
2016-10-30 10:13:55 +01:00
2016-10-19 08:39:47 -07:00
2017-06-14 15:05:54 +02:00