At the moment our re(4) driver will allow the reception of Jumbo frames
with chips that don't have support in the driver. Although I haven't
been able to reproduce this in theory it could be possible to cause
the kernel to crash with such hardware under the right conditions.
OK?
Index: re.c
===================================================================
RCS file: /home/cvs/src/sys/dev/ic/re.c,v
retrieving revision 1.149
diff -u -p -u -p -r1.149 re.c
--- re.c 13 Mar 2014 13:11:30 -0000 1.149
+++ re.c 19 Mar 2014 16:36:20 -0000
@@ -1900,8 +1919,12 @@ re_init(struct ifnet *ifp)
* For 8169 gigE NICs, set the max allowed RX packet
* size so we can receive jumbo frames.
*/
- if (sc->sc_hwrev != RL_HWREV_8139CPLUS)
- CSR_WRITE_2(sc, RL_MAXRXPKTLEN, 16383);
+ if (sc->sc_hwrev != RL_HWREV_8139CPLUS) {
+ if (sc->rl_flags & RL_FLAG_PCIE)
+ CSR_WRITE_2(sc, RL_MAXRXPKTLEN, RE_RX_DESC_BUFLEN);
+ else
+ CSR_WRITE_2(sc, RL_MAXRXPKTLEN, 16383);
+ }
mii_mediachg(&sc->sc_mii);
--
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