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[PATCH 4.4 18/83] perf intel-pt: Ensure IP is zero when state is INTEL_PT_STATE_NO_IP

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  [PATCH 4.4 18/83] perf intel-pt: Ensure IP is zero when state is INTEL_PT_STATE_NO_IP Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-07-25 23:10 +0200

#1696494 — [PATCH 4.4 18/83] perf intel-pt: Ensure IP is zero when state is INTEL_PT_STATE_NO_IP

4.4-stable review patch.  If anyone has any objections, please let me know.

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

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

commit ad7167a8cd174ba7d8c0d0ed8d8410521206d104 upstream.

A value of zero is used to indicate that there is no IP. Ensure the
value is zero when the state is INTEL_PT_STATE_NO_IP.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-5-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 |    1 +
 1 file changed, 1 insertion(+)

--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -2083,6 +2083,7 @@ const struct intel_pt_state *intel_pt_de
 			break;
 		case INTEL_PT_STATE_NO_IP:
 			decoder->last_ip = 0;
+			decoder->ip = 0;
 			/* Fall through */
 		case INTEL_PT_STATE_ERR_RESYNC:
 			err = intel_pt_sync_ip(decoder);

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