This is a note to let you know that I've just added the patch titled MIPS: AR7: Defer registration of GPIO to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mips-ar7-defer-registration-of-gpio.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e6b03ab63b4d270e0249f96536fde632409dc1dc Mon Sep 17 00:00:00 2001 From: Jonas Gorski <jonas.gorski@xxxxxxxxx> Date: Sun, 29 Oct 2017 16:27:19 +0100 Subject: MIPS: AR7: Defer registration of GPIO From: Jonas Gorski <jonas.gorski@xxxxxxxxx> commit e6b03ab63b4d270e0249f96536fde632409dc1dc upstream. When called from prom init code, ar7_gpio_init() will fail as it will call gpiochip_add() which relies on a working kmalloc() to alloc the gpio_desc array and kmalloc is not useable yet at prom init time. Move ar7_gpio_init() to ar7_register_devices() (a device_initcall) where kmalloc works. Fixes: 14e85c0e69d5 ("gpio: remove gpio_descs global array") Signed-off-by: Jonas Gorski <jonas.gorski@xxxxxxxxx> Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@xxxxxxxxxxx> Cc: Nicolas Schichan <nschichan@xxxxxxxxxx> Cc: linux-mips@xxxxxxxxxxxxxx Cc: linux-serial@xxxxxxxxxxxxxxx Patchwork: https://patchwork.linux-mips.org/patch/17542/ Signed-off-by: James Hogan <jhogan@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/mips/ar7/platform.c | 4 ++++ arch/mips/ar7/prom.c | 2 -- 2 files changed, 4 insertions(+), 2 deletions(-) --- a/arch/mips/ar7/platform.c +++ b/arch/mips/ar7/platform.c @@ -653,6 +653,10 @@ static int __init ar7_register_devices(v u32 val; int res; + res = ar7_gpio_init(); + if (res) + pr_warn("unable to register gpios: %d\n", res); + res = ar7_register_uarts(); if (res) pr_err("unable to setup uart(s): %d\n", res); --- a/arch/mips/ar7/prom.c +++ b/arch/mips/ar7/prom.c @@ -246,8 +246,6 @@ void __init prom_init(void) ar7_init_cmdline(fw_arg0, (char **)fw_arg1); ar7_init_env((struct env_var *)fw_arg2); console_config(); - - ar7_gpio_init(); } #define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4))) Patches currently in stable-queue which might be from jonas.gorski@xxxxxxxxx are queue-4.13/mips-ar7-ensure-that-serial-ports-are-properly-set-up.patch queue-4.13/mips-ar7-defer-registration-of-gpio.patch