This is a note to let you know that I've just added the patch titled
MIPS: AR7: Defer registration of GPIO
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: mips-ar7-defer-registration-of-gpio.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From e6b03ab63b4d270e0249f96536fde632409dc1dc Mon Sep 17 00:00:00 2001
From: Jonas Gorski jonas.gorski@gmail.com Date: Sun, 29 Oct 2017 16:27:19 +0100 Subject: MIPS: AR7: Defer registration of GPIO
From: Jonas Gorski jonas.gorski@gmail.com
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@gmail.com Reviewed-by: Florian Fainelli f.fainelli@gmail.com Cc: Ralf Baechle ralf@linux-mips.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Yoshihiro YUNOMAE yoshihiro.yunomae.ez@hitachi.com Cc: Nicolas Schichan nschichan@freebox.fr Cc: linux-mips@linux-mips.org Cc: linux-serial@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17542/ Signed-off-by: James Hogan jhogan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 @@ -654,6 +654,10 @@ 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@gmail.com are
queue-4.4/mips-ar7-ensure-that-serial-ports-are-properly-set-up.patch queue-4.4/mips-ar7-defer-registration-of-gpio.patch