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udf: use crc_itu_t from lib instead of udf_crc

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As pointed out by Sergey Vlasov, UDF implements its own version of
the CRC ITU-T V.41.  Convert it to use the one in the library.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Cc: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Bob Copeland
2008-04-17 09:47:48 +02:00
committed by Jan Kara
parent 706047a797
commit f845fced91
9 changed files with 32 additions and 203 deletions
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10
fs/udf/super.c
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@@ -56,6 +56,7 @@
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/bitmap.h>
#include <linux/crc-itu-t.h>
#include <asm/byteorder.h>
#include "udf_sb.h"
@@ -1765,8 +1766,8 @@ static void udf_open_lvid(struct super_block *sb)
lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
lvid->descTag.descCRC = cpu_to_le16(
udf_crc((char *)lvid + sizeof(tag),
le16_to_cpu(lvid->descTag.descCRCLength), 0));
crc_itu_t(0, (char *)lvid + sizeof(tag),
le16_to_cpu(lvid->descTag.descCRCLength)));
lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
mark_buffer_dirty(bh);
@@ -1800,9 +1801,8 @@ static void udf_close_lvid(struct super_block *sb)
lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
lvid->descTag.descCRC = cpu_to_le16(
udf_crc((char *)lvid + sizeof(tag),
le16_to_cpu(lvid->descTag.descCRCLength),
0));
crc_itu_t(0, (char *)lvid + sizeof(tag),
le16_to_cpu(lvid->descTag.descCRCLength)));
lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
mark_buffer_dirty(bh);