commit 3e9957b4866f3767f19bf0e543b322ad7906c564
Author: Florian Fainelli <florian@openwrt.org>
Date:   Fri May 13 17:41:21 2011 +0200

    MIPS: AR7: Fix GPIO register size for Titan variant.
    
    The 'size' variable contains the correct register size for both AR7
    and Titan, but we never used it to ioremap the correct register size.
    This problem only shows up on Titan.
    
    [ralf@linux-mips.org: Fixed the fix.  The original patch as in patchwork
    recognizes the problem correctly then fails to fix it ...]
    
    Reported-by: Alexander Clouter <alex@digriz.org.uk>
    Signed-off-by: Florian Fainelli <florian@openwrt.org>
    Patchwork: https://patchwork.linux-mips.org/patch/2380/
    Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/ar7/gpio.c b/arch/mips/ar7/gpio.c
index 425dfa5..bb571bc 100644
--- a/arch/mips/ar7/gpio.c
+++ b/arch/mips/ar7/gpio.c
@@ -325,9 +325,7 @@ int __init ar7_gpio_init(void)
 		size = 0x1f;
 	}
 
-	gpch->regs = ioremap_nocache(AR7_REGS_GPIO,
-					AR7_REGS_GPIO + 0x10);
-
+	gpch->regs = ioremap_nocache(AR7_REGS_GPIO, size);
 	if (!gpch->regs) {
 		printk(KERN_ERR "%s: failed to ioremap regs\n",
 					gpch->chip.label);