Author: np
Date: Mon Jun 9 01:39:47 2014
New Revision: 267247
URL: http://svnweb.freebsd.org/changeset/base/267247
Log:
MFC r267082:
cxgbe(4): Properly account for the freelist buffers used when returning
early from service_iq due to a budget restriction. This fixes a potential
rx hang when using INTx.
Approved by: re@ (gjb)
Modified:
stable/9/sys/dev/cxgbe/t4_sge.c
Directory Properties:
stable/9/sys/ (props changed)
stable/9/sys/dev/ (props changed)
Modified: stable/9/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- stable/9/sys/dev/cxgbe/t4_sge.c Mon Jun 9 01:24:53 2014
(r267246)
+++ stable/9/sys/dev/cxgbe/t4_sge.c Mon Jun 9 01:39:47 2014
(r267247)
@@ -1334,8 +1334,15 @@ service_iq(struct sge_iq *iq, int budget
V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
ndescs = 0;
- if (budget)
+ if (budget) {
+ if (fl_bufs_used) {
+ FL_LOCK(fl);
+ fl->needed += fl_bufs_used;
+ refill_fl(sc, fl, 32);
+ FL_UNLOCK(fl);
+ }
return (EINPROGRESS);
+ }
}
}
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