diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2017-05-24 10:01:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-14 15:06:03 +0200 |
| commit | bb0a300f18cef240373fc2820e2114331c5e9773 (patch) | |
| tree | 67dce126315d1636fd2576607e8bf57bfbc09b02 | |
| parent | 59d9a40b5839d98e324cc78aab89d74bc4c7276f (diff) | |
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>
| -rw-r--r-- | arch/powerpc/sysdev/simple_gpio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/simple_gpio.c b/arch/powerpc/sysdev/simple_gpio.c index ef470b470b04..6afddae2fb47 100644 --- a/arch/powerpc/sysdev/simple_gpio.c +++ b/arch/powerpc/sysdev/simple_gpio.c @@ -75,7 +75,8 @@ static int u8_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) static void u8_gpio_save_regs(struct of_mm_gpio_chip *mm_gc) { - struct u8_gpio_chip *u8_gc = gpiochip_get_data(&mm_gc->gc); + struct u8_gpio_chip *u8_gc = + container_of(mm_gc, struct u8_gpio_chip, mm_gc); u8_gc->data = in_8(mm_gc->regs); } |