linux-kernel - [tip:perf/urgent] perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT

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Date:   Thu, 7 Jun 2018 01:22:08 -0700
From:   tip-bot for Adrian Hunter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, acme@...hat.com, adrian.hunter@...el.com,
        hpa@...or.com, linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: [tip:perf/urgent] perf intel-pt: Fix sync_switch
 INTEL_PT_SS_NOT_TRACING

Commit-ID:  dbcb82b93f3e8322891e47472c89e63058b81e99
Gitweb:     https://git.kernel.org/tip/dbcb82b93f3e8322891e47472c89e63058b81e99
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Thu, 31 May 2018 13:23:42 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 6 Jun 2018 12:52:07 -0300

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@...el.com>
Cc: stable@...r.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@...hat.com>
---
 tools/perf/util/intel-pt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 492986a25ef6..3db7f0ee52a8 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -1521,6 +1521,7 @@ static int intel_pt_sample(struct intel_pt_queue *ptq)
 
 	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);