From 8a549f8b581db95fec1e2d86ff857594fcfcd9db Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Fri, 22 Aug 2008 16:15:22 -0500 Subject: [PATCH] [IA64] Fix __{in,out}s{w,l} to handle unaligned data Some ia64 systems produce several repeats of kernel messages like this: kernel unaligned access to 0xe000000644220466, ip=0xa000000100516fa1 This was tracked to ide code using the __cmd[] field in "struct request" via the __outsw() function. __cmd[] is a char array, so is not guaranteed to be properly aligned when accessed as words. Tested-by: Nishanth Aravamudan Signed-off-by: James Bottomley Signed-off-by: Tony Luck --- arch/ia64/include/asm/io.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h index 260a85ac9d6a..7f257507cd86 100644 --- a/arch/ia64/include/asm/io.h +++ b/arch/ia64/include/asm/io.h @@ -19,6 +19,8 @@ * Copyright (C) 1999 Don Dugger */ +#include + /* We don't use IO slowdowns on the ia64, but.. */ #define __SLOW_DOWN_IO do { } while (0) #define SLOW_DOWN_IO do { } while (0) @@ -241,7 +243,7 @@ __insw (unsigned long port, void *dst, unsigned long count) unsigned short *dp = dst; while (count--) - *dp++ = platform_inw(port); + put_unaligned(platform_inw(port), dp++); } static inline void @@ -250,7 +252,7 @@ __insl (unsigned long port, void *dst, unsigned long count) unsigned int *dp = dst; while (count--) - *dp++ = platform_inl(port); + put_unaligned(platform_inl(port), dp++); } static inline void @@ -268,7 +270,7 @@ __outsw (unsigned long port, const void *src, unsigned long count) const unsigned short *sp = src; while (count--) - platform_outw(*sp++, port); + platform_outw(get_unaligned(sp++), port); } static inline void @@ -277,7 +279,7 @@ __outsl (unsigned long port, const void *src, unsigned long count) const unsigned int *sp = src; while (count--) - platform_outl(*sp++, port); + platform_outl(get_unaligned(sp++), port); } /* -- 2.20.1