svn commit: r212755 - head/sys/dev/bge

[Pyun YongHyeon]

Author: yongari
Date: Thu Sep 16 17:32:37 2010
New Revision: 212755
URL: http://svn.freebsd.org/changeset/base/212755

Log:
  Fix incorrect RX BD producer updates. The producer index was
  already updated after allocating mbuf so driver had to use the last
  index instead of using next producer index. This should fix driver
  hang which may happen under high network load.
  
  Reported by:	Igor Sysoev <is <> rambler-co dot ru>, Vlad Galu <dudu <> dudu dot ro>
  Tested by:	Igor Sysoev <is <> rambler-co dot ru>, Vlad Galu <dudu <> dudu dot ro>
  MFC after:	10 days

Modified:
  head/sys/dev/bge/if_bge.c

Modified: head/sys/dev/bge/if_bge.c
==============================================================================
--- head/sys/dev/bge/if_bge.c	Thu Sep 16 17:24:25 2010	(r212754)
+++ head/sys/dev/bge/if_bge.c	Thu Sep 16 17:32:37 2010	(r212755)
@@ -3386,9 +3386,11 @@ bge_rxeof(struct bge_softc *sc, uint16_t
 	sc->bge_rx_saved_considx = rx_cons;
 	bge_writembx(sc, BGE_MBX_RX_CONS0_LO, sc->bge_rx_saved_considx);
 	if (stdcnt)
-		bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, sc->bge_std);
+		bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, (sc->bge_std +
+		    BGE_STD_RX_RING_CNT - 1) % BGE_STD_RX_RING_CNT);
 	if (jumbocnt)
-		bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, sc->bge_jumbo);
+		bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, (sc->bge_jumbo +
+		    BGE_JUMBO_RX_RING_CNT - 1) % BGE_JUMBO_RX_RING_CNT);
 #ifdef notyet
 	/*
 	 * This register wraps very quickly under heavy packet drops.