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lib/checksum: fix one more thinko

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When do_csum gets unaligned data, we really need to treat
the first byte as an even byte, not an odd byte, because
we swap the two halves later.

Found by Mike's checksum-selftest module.

Reported-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2009-06-23 22:52:51 +02:00
parent 20c1f641bb
commit 0a5549ed16
1 changed files with 2 additions and 2 deletions
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4
lib/checksum.c
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@ -57,9 +57,9 @@ static unsigned int do_csum(const unsigned char *buff, int len)
odd = 1 & (unsigned long) buff; odd = 1 & (unsigned long) buff;
if (odd) { if (odd) {
#ifdef __LITTLE_ENDIAN #ifdef __LITTLE_ENDIAN
result = *buff;
#else
result += (*buff << 8); result += (*buff << 8);
#else
result = *buff;
#endif #endif
len--; len--;
buff++; buff++;