[libteam]: timerfd read() could return 0 fix (#3393)

* Update sonic-quagga submodule

* [libteam]: timerfd read() could return 0

src/libteam/patch/0010-When-read-of-timerfd-returned-0-don-t-consider-this-.patch

@@ -0,0 +1,39 @@
+From 038bed6fe3970dc829dbf9a282f7bea7198e7826 Mon Sep 17 00:00:00 2001
+From: Pavel Shirshov <pavelsh@microsoft.com.com>
+Date: Wed, 28 Aug 2019 16:39:35 -0700
+Subject: [PATCH] When read of timerfd returned 0, don't consider this an error
+
+Just skip this event.
+---
+ teamd/teamd.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/teamd/teamd.c b/teamd/teamd.c
+index 96794e8..a5ce745 100644
+--- a/teamd/teamd.c
++++ b/teamd/teamd.c
+@@ -285,6 +285,10 @@ static int handle_period_fd(int fd)
+ 		teamd_log_err("read() failed.");
+ 		return -errno;
+ 	}
++	if (ret == 0) {
++		teamd_log_warn("read() for timer_fd returned 0.");
++		return 1;
++	}
+ 	if (ret != sizeof(uint64_t)) {
+ 		teamd_log_err("read() returned unexpected number of bytes.");
+ 		return -EINVAL;
+@@ -345,7 +349,9 @@ static int teamd_run_loop_do_callbacks(struct list_item *lcb_list, fd_set *fds,
+ 				continue;
+ 			if (lcb->is_period) {
+ 				err = handle_period_fd(lcb->fd);
+-				if (err)
++				if (err == 1)
++					continue; /* timerfd returned 0. Don't do anything */
++				if (err < 0)
+ 					return err;
+ 			}
+ 			err = lcb->func(ctx, events, lcb->priv);
+-- 
+2.7.4
+

src/libteam/patch/series

@@ -7,3 +7,4 @@
 0007-Send-LACP-PDU-immediately-if-our-state-changed.patch
 0008-libteam-Add-warm_reboot-mode.patch
 0009-Fix-ifinfo_link_with_port-race-condition-with-newlink.patch
+0010-When-read-of-timerfd-returned-0-don-t-consider-this-.patch