linux-kernel - [added to the 3.18 stable tree] MIPS: BCM63xx: Move bcm63xx_gpio_init() to bcm63xx_register

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Date:	Sat, 16 May 2015 10:33:10 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	stable@...r.kernel.org, stable-commits@...r.kernel.org
Cc:	Nicolas Schichan <nschichan@...ebox.fr>, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org,
	Alexandre Courbot <acourbot@...dia.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Sasha Levin <sasha.levin@...cle.com>
Subject: [added to the 3.18 stable tree] MIPS: BCM63xx: Move bcm63xx_gpio_init() to bcm63xx_register_devices().

From: Nicolas Schichan <nschichan@...ebox.fr>

This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.

===============

[ Upstream commit 2ec459f2a77b808c1e5a3616c88b613d3f720c8d ]

When called from prom init code, bcm63xx_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 bcm63xx_gpio_init() to bcm63xx_register_devices() (an
arch_initcall) where kmalloc works.

Fixes: 14e85c0e69d5 ("gpio: remove gpio_descs global array")

Signed-off-by: Nicolas Schichan <nschichan@...ebox.fr>
Cc: linux-mips@...ux-mips.org
Cc: linux-kernel@...r.kernel.org
Cc: Alexandre Courbot <acourbot@...dia.com>
Patchwork: https://patchwork.linux-mips.org/patch/9530/
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
---
 arch/mips/bcm63xx/prom.c  | 4 ----
 arch/mips/bcm63xx/setup.c | 4 ++++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/mips/bcm63xx/prom.c b/arch/mips/bcm63xx/prom.c
index e1f27d6..7019e29 100644
--- a/arch/mips/bcm63xx/prom.c
+++ b/arch/mips/bcm63xx/prom.c
@@ -17,7 +17,6 @@
 #include <bcm63xx_cpu.h>
 #include <bcm63xx_io.h>
 #include <bcm63xx_regs.h>
-#include <bcm63xx_gpio.h>
 
 void __init prom_init(void)
 {
@@ -53,9 +52,6 @@ void __init prom_init(void)
 	reg &= ~mask;
 	bcm_perf_writel(reg, PERF_CKCTL_REG);
 
-	/* register gpiochip */
-	bcm63xx_gpio_init();
-
 	/* do low level board init */
 	board_prom_init();
 
diff --git a/arch/mips/bcm63xx/setup.c b/arch/mips/bcm63xx/setup.c
index 6660c7d..240fb4f 100644
--- a/arch/mips/bcm63xx/setup.c
+++ b/arch/mips/bcm63xx/setup.c
@@ -20,6 +20,7 @@
 #include <bcm63xx_cpu.h>
 #include <bcm63xx_regs.h>
 #include <bcm63xx_io.h>
+#include <bcm63xx_gpio.h>
 
 void bcm63xx_machine_halt(void)
 {
@@ -160,6 +161,9 @@ void __init plat_mem_setup(void)
 
 int __init bcm63xx_register_devices(void)
 {
+	/* register gpiochip */
+	bcm63xx_gpio_init();
+
 	return board_register_devices();
 }
 
-- 
2.1.0

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