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perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT_TRACING 

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>
This commit is contained in:
Adrian Hunter 2018-05-31 13:23:42 +03:00 committed by Arnaldo Carvalho de Melo
parent ec1e6e6a68
commit dbcb82b93f
1 changed files with 1 additions and 0 deletions
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1
tools/perf/util/intel-pt.c
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@ -1521,6 +1521,7 @@ static int intel_pt_sample(struct intel_pt_queue *ptq)
if (intel_pt_is_switch_ip(ptq, state->to_ip)) { if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
switch (ptq->switch_state) { switch (ptq->switch_state) {
case INTEL_PT_SS_NOT_TRACING:
case INTEL_PT_SS_UNKNOWN: case INTEL_PT_SS_UNKNOWN:
case INTEL_PT_SS_EXPECTING_SWITCH_IP: case INTEL_PT_SS_EXPECTING_SWITCH_IP:
err = intel_pt_next_tid(pt, ptq); err = intel_pt_next_tid(pt, ptq);