4.4-stable review patch. If anyone has any objections, please let me know.
------------------
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
@@ -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)))