Author: jhb
Date: Thu Nov 1 21:39:33 2018
New Revision: 340021
URL: https://svnweb.freebsd.org/changeset/base/340021
Log:
Assert that reclaim_tx_descs() is always making forward progress.
MFC after: 2 months
Sponsored by: Chelsio Communications
Modified:
head/sys/dev/cxgbe/t4_sge.c
Modified: head/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sge.c Thu Nov 1 21:34:17 2018 (r340020)
+++ head/sys/dev/cxgbe/t4_sge.c Thu Nov 1 21:39:33 2018 (r340021)
@@ -5079,6 +5079,9 @@ reclaim_tx_descs(struct sge_txq *txq, u_int n)
KASSERT(can_reclaim >= ndesc,
("%s: unexpected number of credits: %d, %d",
__func__, can_reclaim, ndesc));
+ KASSERT(ndesc != 0,
+ ("%s: descriptor with no credits: cidx %d",
+ __func__, eq->cidx));
for (m = txsd->m; m != NULL; m = nextpkt) {
nextpkt = m->m_nextpkt;
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