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Subject[PATCH 4.14 119/157] perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT_TRACING
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Adrian Hunter <adrian.hunter@intel.com>

commit dbcb82b93f3e8322891e47472c89e63058b81e99 upstream.

sync_switch is a facility to synchronize decoding more closely with the
point in the kernel when the context actually switched.

In one case, INTEL_PT_SS_NOT_TRACING state was not correctly
transitioning to INTEL_PT_SS_TRACING state due to a missing case clause.
Add it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1527762225-26024-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
tools/perf/util/intel-pt.c | 1 +
1 file changed, 1 insertion(+)

--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -1560,6 +1560,7 @@ static int intel_pt_sample(struct intel_

if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
switch (ptq->switch_state) {
+ case INTEL_PT_SS_NOT_TRACING:
case INTEL_PT_SS_UNKNOWN:
case INTEL_PT_SS_EXPECTING_SWITCH_IP:
err = intel_pt_next_tid(pt, ptq);

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