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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-08-22 16:15:22 -0500 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2008-08-25 11:23:13 -0700 |
| commit | 8a549f8b581db95fec1e2d86ff857594fcfcd9db (patch) | |
| tree | dbf33ff8ee4c20ba7737c2968d5c7188bc3c4dff /arch/ia64 | |
| parent | 42aca483ddee8888926d913b660e1dd38d748ba9 (diff) | |
| download | linux-8a549f8b581db95fec1e2d86ff857594fcfcd9db.tar.gz linux-8a549f8b581db95fec1e2d86ff857594fcfcd9db.tar.bz2 linux-8a549f8b581db95fec1e2d86ff857594fcfcd9db.zip | |
[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 <nacc@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/io.h | 10 |
1 files 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 <don.dugger@intel.com> */ +#include <asm/unaligned.h> + /* 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); } /* |