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RealTek 8139C+ incorrectly identifies UDP checksum 0xffff as bad. 

Force software recalculation of UDP checksum if bad checksum is
reported by the hardware.
This commit is contained in:
uwe 2014-10-14 00:56:48 +00:00
parent 7ed90a21cf
commit ecaa2e9847
1 changed files with 15 additions and 5 deletions
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20
sys/dev/ic/rtl8169.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: rtl8169.c,v 1.141 2014/10/10 17:41:05 christos Exp $ */
/* $NetBSD: rtl8169.c,v 1.142 2014/10/14 00:56:48 uwe Exp $ */
/*
* Copyright (c) 1997, 1998-2003
@ -33,7 +33,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rtl8169.c,v 1.141 2014/10/10 17:41:05 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: rtl8169.c,v 1.142 2014/10/14 00:56:48 uwe Exp $");
/* $FreeBSD: /repoman/r/ncvs/src/sys/dev/re/if_re.c,v 1.20 2004/04/11 20:34:08 ru Exp $ */
/*
@ -1311,9 +1311,19 @@ re_rxeof(struct rtk_softc *sc)
M_CSUM_TCP_UDP_BAD;
} else if (RE_UDPPKT(rxstat)) {
m->m_pkthdr.csum_flags |= M_CSUM_UDPv4;
if (rxstat & RE_RDESC_STAT_UDPSUMBAD)
m->m_pkthdr.csum_flags |=
M_CSUM_TCP_UDP_BAD;
if (rxstat & RE_RDESC_STAT_UDPSUMBAD) {
/*
* XXX: 8139C+ thinks UDP csum
* 0xFFFF is bad, force software
* calculation.
*/
if (sc->sc_quirk & RTKQ_8139CPLUS)
m->m_pkthdr.csum_flags
&= ~M_CSUM_UDPv4;
else
m->m_pkthdr.csum_flags
|= M_CSUM_TCP_UDP_BAD;
}
}
}
} else {