netdev - Re: [PATCH 1/4] sctp: Fix crc32c calculations on big-endian arhes.

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Message-ID: <20090123052849.GA25937@gondor.apana.org.au>
Date:	Fri, 23 Jan 2009 16:28:49 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Vlad Yasevich <vladislav.yasevich@...com>
Cc:	netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
	davem@...emloft.net
Subject: Re: [PATCH 1/4] sctp: Fix crc32c calculations on big-endian arhes.

On Fri, Jan 23, 2009 at 04:19:56PM +1100, Herbert Xu wrote:
> Vlad Yasevich <vladislav.yasevich@...com> wrote:
> >
> > diff --git a/include/net/sctp/checksum.h b/include/net/sctp/checksum.h
> > index b799fb2..2fec3c3 100644
> > --- a/include/net/sctp/checksum.h
> > +++ b/include/net/sctp/checksum.h
> > @@ -79,5 +79,5 @@ static inline __be32 sctp_update_cksum(__u8 *buffer, __u16 length, __be32 crc32)
> > 
> > static inline __be32 sctp_end_cksum(__be32 crc32)
> > {
> > -       return ~crc32;
> > +       return (__force __be32)~cpu_to_le32((__force u32)crc32);
> > }
> 
> Ouch, surely there is a better way to do this?

In fact this looks wrong.  Has this code actually been tested
on big-endian?

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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