Re: mec and resets

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

jacereda%gmail.com@localhost wrote:

> I crashed the machine in my first 'scp' attempt.
> The good thing is that it doesn't reboot, it just freezes, so at  
> least we know that the watchdog was causing the reboot.

How about this one more change? (what Linux driver does)

---
Index: if_mec.c
===================================================================
RCS file: /cvsroot/src/sys/arch/sgimips/mace/if_mec.c,v
retrieving revision 1.20
diff -u -r1.20 if_mec.c
--- if_mec.c    14 May 2008 13:29:28 -0000      1.20
+++ if_mec.c    4 Aug 2008 13:51:14 -0000
@@ -836,7 +837,8 @@
                        break;
                m = NULL;
 
-               if (sc->sc_txpending == MEC_NTXDESC) {
+               if (sc->sc_txpending == MEC_NTXDESC - 1) {
+                       /* preserve the last entry to avoid wraparound */
                        break;
                }
 

---
Izumi Tsutsui