Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4039579f authored by Adrian Hunter's avatar Adrian Hunter Committed by Greg Kroah-Hartman
Browse files

perf intel-pt: Fix error recovery from missing TIP packet 



commit 1c196a6c771c47a2faa63d38d913e03284f73a16 upstream.

When a TIP packet is expected but there is a different packet, it is an
error. However the unexpected packet might be something important like a
TSC packet, so after the error, it is necessary to continue from there,
rather than the next packet. That is achieved by setting pkt_step to
zero.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1520431349-30689-4-git-send-email-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0733facf

tools/perf/util/intel-pt-decoder/intel-pt-decoder.c

+1 −0
Original line number Diff line number Diff line
@@ -1616,6 +1616,7 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder) 
		case INTEL_PT_PWRX:

			intel_pt_log("ERROR: Missing TIP after FUP\n");

			decoder->pkt_state = INTEL_PT_STATE_ERR3;

			decoder->pkt_step = 0;

			return -ENOENT;



		case INTEL_PT_OVF: