Author: np
Date: Thu Jun 5 00:38:32 2014
New Revision: 267082
URL: http://svnweb.freebsd.org/changeset/base/267082
Log:
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.
MFC after: 3 days
Modified:
head/sys/dev/cxgbe/t4_sge.c
Modified: head/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sge.c Wed Jun 4 21:17:51 2014 (r267081)
+++ head/sys/dev/cxgbe/t4_sge.c Thu Jun 5 00:38:32 2014 (r267082)
@@ -1424,8 +1424,15 @@ service_iq(struct sge_iq *iq, int budget
}
#endif
- 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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