From: Benny Halevy <bhalevy@fs1.bhalevy.com>
Date: Thu, 8 Nov 2007 13:34:09 +0000 (+0800)
Subject: [LIB] crc32c: Keep intermediate crc state in cpu order
X-Git-Tag: v2.6.24-rc3~173^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef19454bd437b2ba14c9cda1de85debd9f383484;p=linux-2.6

[LIB] crc32c: Keep intermediate crc state in cpu order

crypto/crc32.c:chksum_final() is computing the digest as
*(__le32 *)out = ~cpu_to_le32(mctx->crc);
so the low-level crc32c_le routines should just keep
the crc in cpu order, otherwise it is getting swabbed
one too many times on big-endian machines.

Signed-off-by: Benny Halevy <bhalevy@fs1.bhalevy.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c
index 802f11f0bf..b5c3287d8e 100644
--- a/lib/libcrc32c.c
+++ b/lib/libcrc32c.c
@@ -33,7 +33,6 @@
 #include <linux/crc32c.h>
 #include <linux/compiler.h>
 #include <linux/module.h>
-#include <asm/byteorder.h>
 
 MODULE_AUTHOR("Clay Haapala <chaapala@cisco.com>");
 MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations");
@@ -161,15 +160,13 @@ static const u32 crc32c_table[256] = {
  */
 
 u32 __pure
-crc32c_le(u32 seed, unsigned char const *data, size_t length)
+crc32c_le(u32 crc, unsigned char const *data, size_t length)
 {
-	u32 crc = __cpu_to_le32(seed);
-	
 	while (length--)
 		crc =
 		    crc32c_table[(crc ^ *data++) & 0xFFL] ^ (crc >> 8);
 
-	return __le32_to_cpu(crc);
+	return crc;
 }
 
 #endif	/* CRC_LE_BITS == 8 */