From 4e038c1724e14f6d81370a6a75a4f671b3bbbbd1 Mon Sep 17 00:00:00 2001
From: Xiang Xiao <xiaoxiang@xiaomi.com>
Date: Fri, 11 Jun 2021 04:55:04 -0700
Subject: [PATCH] serial/pty: Don't return -NOSYS if pollfd::events equals 0

since the caller is free not to monitor any event

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: Ib957be1b1b5a686faea0196bc9069e0908a492eb
---
 drivers/serial/pty.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/serial/pty.c b/drivers/serial/pty.c
index d540983448..99c7514880 100644
--- a/drivers/serial/pty.c
+++ b/drivers/serial/pty.c
@@ -944,8 +944,6 @@ static int pty_poll(FAR struct file *filep, FAR struct pollfd *fds,
       return ret;
     }
 
-  ret = -ENOSYS;
-
   if (setup)
     {
       for (i = 0; i < CONFIG_DEV_PTY_NPOLLWAITERS; i++)