Author: cem
Date: Fri Oct 28 23:53:36 2016
New Revision: 308069
URL: https://svnweb.freebsd.org/changeset/base/308069
Log:
ioat(4): Add failpoint for delay() in ioat_release
Sponsored by: Dell EMC Isilon
Modified:
head/sys/dev/ioat/ioat.c
Modified: head/sys/dev/ioat/ioat.c
==============================================================================
--- head/sys/dev/ioat/ioat.c Fri Oct 28 23:53:35 2016 (r308068)
+++ head/sys/dev/ioat/ioat.c Fri Oct 28 23:53:36 2016 (r308069)
@@ -33,6 +33,7 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
+#include <sys/fail.h>
#include <sys/ioccom.h>
#include <sys/kernel.h>
#include <sys/lock.h>
@@ -951,8 +952,12 @@ ioat_release(bus_dmaengine_t dmaengine)
struct ioat_softc *ioat;
ioat = to_ioat_softc(dmaengine);
- CTR3(KTR_IOAT, "%s channel=%u dispatch hw_head=%u", __func__,
- ioat->chan_idx, ioat->hw_head & UINT16_MAX);
+ CTR4(KTR_IOAT, "%s channel=%u dispatch1 hw_head=%u head=%u", __func__,
+ ioat->chan_idx, ioat->hw_head & UINT16_MAX, ioat->head);
+ KFAIL_POINT_CODE(DEBUG_FP, ioat_release, /* do nothing */);
+ CTR4(KTR_IOAT, "%s channel=%u dispatch2 hw_head=%u head=%u", __func__,
+ ioat->chan_idx, ioat->hw_head & UINT16_MAX, ioat->head);
+
ioat_write_2(ioat, IOAT_DMACOUNT_OFFSET, (uint16_t)ioat->hw_head);
if (!ioat->is_completion_pending) {
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