Author: jhb
Date: Fri Nov 4 21:52:48 2016
New Revision: 308320
URL: https://svnweb.freebsd.org/changeset/base/308320
Log:
MFC 297883:
cxgbe(4): Always dispatch all work requests that have been written to the
descriptor ring before leaving drain_wrq_wr_list.
Modified:
stable/10/sys/dev/cxgbe/t4_sge.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- stable/10/sys/dev/cxgbe/t4_sge.c Fri Nov 4 21:48:22 2016
(r308319)
+++ stable/10/sys/dev/cxgbe/t4_sge.c Fri Nov 4 21:52:48 2016
(r308320)
@@ -1750,7 +1750,8 @@ drain_wrq_wr_list(struct adapter *sc, st
MPASS(TAILQ_EMPTY(&wrq->incomplete_wrs));
wr = STAILQ_FIRST(&wrq->wr_list);
MPASS(wr != NULL); /* Must be called with something useful to do */
- dbdiff = IDXDIFF(eq->pidx, eq->dbidx, eq->sidx);
+ MPASS(eq->pidx == eq->dbidx);
+ dbdiff = 0;
do {
eq->cidx = read_hw_cidx(eq);
@@ -1762,7 +1763,7 @@ drain_wrq_wr_list(struct adapter *sc, st
MPASS(wr->wrq == wrq);
n = howmany(wr->wr_len, EQ_ESIZE);
if (available < n)
- return;
+ break;
dst = (void *)&eq->desc[eq->pidx];
if (__predict_true(eq->sidx - eq->pidx > n)) {
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