3.18-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 4.9.40 / perf-intel-pt-clear-fup-flag-on-error.patch

From 6a558f12dbe85437acbdec5e149ea07b5554eced Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Fri, 26 May 2017 11:17:09 +0300
Subject: perf intel-pt: Clear FUP flag on error

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

commit 6a558f12dbe85437acbdec5e149ea07b5554eced upstream.

Sometimes a FUP packet is associated with a TSX transaction and a flag is
set to indicate that. Ensure that flag is cleared on any error condition
because at that point the decoder can no longer assume it is correct.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-9-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-decoder/intel-pt-decoder.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1960,6 +1960,8 @@ static int intel_pt_sync_ip(struct intel
 {
 	int err;
 
+	decoder->set_fup_tx_flags = false;
+
 	intel_pt_log("Scanning for full IP\n");
 	err = intel_pt_walk_to_ip(decoder);
 	if (err)