Author: cem
Date: Tue Jul 12 21:56:57 2016
New Revision: 302683
URL: https://svnweb.freebsd.org/changeset/base/302683
Log:
ioat(4): Assert against ring underflow
Modified:
head/sys/dev/ioat/ioat.c
Modified: head/sys/dev/ioat/ioat.c
==============================================================================
--- head/sys/dev/ioat/ioat.c Tue Jul 12 21:56:55 2016 (r302682)
+++ head/sys/dev/ioat/ioat.c Tue Jul 12 21:56:57 2016 (r302683)
@@ -702,6 +702,11 @@ ioat_process_events(struct ioat_softc *i
ioat->tail++;
if (desc->hw_desc_bus_addr == status)
break;
+
+ KASSERT(ioat_get_active(ioat) > 0, ("overrunning ring t:%u "
+ "h:%u st:0x%016lx last_seen:%016lx completed:%u\n",
+ ioat->tail, ioat->head, comp_update, ioat->last_seen,
+ completed));
}
ioat->last_seen = desc->hw_desc_bus_addr;
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