testptp: set pin function before other requests

When the -L option of the testptp utility is specified with other
options (e.g. -p to enable PPS output), the user probably wants to
apply it to the pin configured by the -L option.

Reorder the code to set the pin function before other function requests
to avoid confusing users.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://lore.kernel.org/r/20220105152506.3256026-1-mlichvar@redhat.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/ptp/testptp.c

@@ -354,6 +354,18 @@ int main(int argc, char *argv[])
 		}
 	}
 
+	if (pin_index >= 0) {
+		memset(&desc, 0, sizeof(desc));
+		desc.index = pin_index;
+		desc.func = pin_func;
+		desc.chan = index;
+		if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
+			perror("PTP_PIN_SETFUNC");
+		} else {
+			puts("set pin function okay");
+		}
+	}
+
 	if (extts) {
 		memset(&extts_request, 0, sizeof(extts_request));
 		extts_request.index = index;
@@ -444,18 +456,6 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	if (pin_index >= 0) {
-		memset(&desc, 0, sizeof(desc));
-		desc.index = pin_index;
-		desc.func = pin_func;
-		desc.chan = index;
-		if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
-			perror("PTP_PIN_SETFUNC");
-		} else {
-			puts("set pin function okay");
-		}
-	}
-
 	if (pps != -1) {
 		int enable = pps ? 1 : 0;
 		if (ioctl(fd, PTP_ENABLE_PPS, enable)) {