Add a method to remove a port from the clock's polling array.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>

clock.c

@@ -368,6 +368,20 @@ void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
 	pr_debug("path delay    %10lld %10lld", c->path_delay, pd);
 }
 
+void clock_remove_fda(struct clock *c, struct port *p, struct fdarray fda)
+{
+	int i, j, k;
+	for (i = 0; i < c->nports; i++) {
+		if (p == c->port[i])
+			break;
+	}
+	for (j = 0; j < fda.cnt; j++) {
+		k = N_POLLFD * i + j;
+		c->pollfd[k].fd = -1;
+		c->pollfd[k].events = 0;
+	}
+}
+
 int clock_slave_only(struct clock *c)
 {
 	return c->dds.slaveOnly;

clock.h

@@ -135,6 +135,14 @@ void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
  */
 int clock_poll(struct clock *c);
 
+/**
+ * Remove a port's file descriptor array from its controlling clock.
+ * @param c    The clock instance.
+ * @param p    The port removing the array.
+ * @param fda  The port's file decriptor array.
+ */
+void clock_remove_fda(struct clock *c, struct port *p, struct fdarray fda);
+
 /**
  * Obtain the slave-only flag from a clock's default data set.
  * @param c  The clock instance.