Date: Thu, 28 Feb 2002 22:58:03 -0800 From: "George V. Neville-Neil" <gnn@neville-neil.com> To: Bob Bishop <rb@gid.co.uk> Cc: Doug Ambrisko <ambrisko@ambrisko.com>, hackers@FreeBSD.ORG Subject: Re: Multicast problem with sis interface? Message-ID: <200203010658.WAA1805200@meer.meer.net> In-Reply-To: Message from Bob Bishop <rb@gid.co.uk> of "Fri, 22 Feb 2002 17:05:41 GMT." <4.3.2.7.2.20020222165515.00c14850@gid.co.uk>
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Here is a context diff that fixes the driver. Not the most performant solution
(it requires allocating a new, zero'd, mbuf) but it's the most straightforward
fix. Auto Padding is still on in the driver. I saw no reason to disable this
even
though we're now go around it.
This fix is against -CURRENT of 20 Feb 2002 vintage.
I've submitted a PR with the patch in the comments.
Later,
George
Index: if_sis.c
===================================================================
RCS file: /music/FreeBSD-CVS/src/sys/pci/if_sis.c,v
retrieving revision 1.48
diff -c -r1.48 if_sis.c
*** if_sis.c 6 Feb 2002 22:06:47 -0000 1.48
--- if_sis.c 1 Mar 2002 06:51:46 -0000
***************
*** 1665,1671 ****
struct ifnet *ifp;
{
struct sis_softc *sc;
! struct mbuf *m_head = NULL;
u_int32_t idx;
sc = ifp->if_softc;
--- 1665,1671 ----
struct ifnet *ifp;
{
struct sis_softc *sc;
! struct mbuf *m_head = NULL, *m_zero = NULL;
u_int32_t idx;
sc = ifp->if_softc;
***************
*** 1687,1692 ****
--- 1687,1701 ----
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
+
+ if (m_head->m_pkthdr.len < ETHER_MIN_LEN) {
+ m_zero = m_get_clrd(M_DONTWAIT, MT_DATA);
+ if (m_zero == NULL)
+ break;
+ m_zero->m_len = ETHER_MIN_LEN - m_head->m_pkthdr.len;
+ m_cat(m_head, m_zero);
+ m_head->m_pkthdr.len = ETHER_MIN_LEN;
+ }
if (sis_encap(sc, m_head, &idx)) {
IF_PREPEND(&ifp->if_snd, m_head);
--
George V. Neville-Neil gnn@neville-neil.com
NIC:GN82
"Those who would trade liberty for temporary security deserve neither"
- Benjamin Franklin
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