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crypto: mips/crc32 - fix the CRC32C implementation

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Commit ca459e5f82 ("crypto: mips/crc32 - Clean up useless assignment
operations") changed crc32c_mips_le_hw() to use the instructions that
use the "regular" CRC32 polynomial instead of the Castagnoli polynomial.
Therefore it can't be computing CRC32C values correctly anymore.

I haven't been successful in running a MIPS kernel in QEMU, but based on
code review this is the fix that is needed.

Fixes: ca459e5f82 ("crypto: mips/crc32 - Clean up useless assignment operations")
Cc: Guan Wentao <guanwentao@uniontech.com>
Cc: WangYuli <wangyuli@uniontech.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Wentao Guan <guanwentao@uniontech.com>
Acked-by: WangYuli <wangyuli@uniontech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2024-10-20 11:02:58 -07:00 committed by Herbert Xu
parent cd843399d7
commit dd41b283ef
1 changed files with 3 additions and 3 deletions
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6
arch/mips/crypto/crc32-mips.c
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@ -123,20 +123,20 @@ static u32 crc32c_mips_le_hw(u32 crc_, const u8 *p, unsigned int len)
for (; len >= sizeof(u64); p += sizeof(u64), len -= sizeof(u64)) {
u64 value = get_unaligned_le64(p);
CRC32(crc, value, d);
CRC32C(crc, value, d);
}
if (len & sizeof(u32)) {
u32 value = get_unaligned_le32(p);
CRC32(crc, value, w);
CRC32C(crc, value, w);
p += sizeof(u32);
}
} else {
for (; len >= sizeof(u32); len -= sizeof(u32)) {
u32 value = get_unaligned_le32(p);
CRC32(crc, value, w);
CRC32C(crc, value, w);
p += sizeof(u32);
}
}