fix ts2phc to reset NMEA parser after RMC message (RHEL-54724)

Resolves: RHEL-54724

linuxptp-nmeareset.patch

@@ -0,0 +1,26 @@
+commit 293ca74b9df22a75951eea72426869a7ee9eb023
+Author: Miroslav Lichvar <mlichvar@redhat.com>
+Date:   Tue Jun 11 16:17:36 2024 +0200
+
+    ts2phc: Reset parser after RMC message.
+    
+    When the receiver was configured to generate only RMC messages, every
+    other message was skipped due to the parser not being in the right
+    state to process another message. Reset the parser to correctly parse
+    every valid message.
+    
+    Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
+    Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
+
+diff --git a/nmea.c b/nmea.c
+index 44c7c01..7f1d9a2 100644
+--- a/nmea.c
++++ b/nmea.c
+@@ -171,6 +171,7 @@ int nmea_parse(struct nmea_parser *np, const char *ptr, int buflen,
+ 	while (buflen) {
+ 		if (!nmea_parse_symbol(np, *ptr)) {
+ 			if (!nmea_scan_rmc(np, result)) {
++				nmea_reset(np);
+ 				*parsed = count + 1;
+ 				return 0;
+ 			}

linuxptp.spec

@@ -31,6 +31,8 @@ Source22:	linuxptp.te
 Patch1:		linuxptp-ucastrate.patch
 # add holdover support to ts2phc
 Patch2:		linuxptp-holdover.patch
+# fix ts2phc to reset NMEA parser after RMC message
+Patch3:		linuxptp-nmeareset.patch
 # fix ts2phc to handle large NMEA delay
 Patch4:		linuxptp-nmeadelay.patch