From 6dde42d79b906c3e7b1d4a439b6030fb45d8bd6b Mon Sep 17 00:00:00 2001
From: "chao.an" <anchao@xiaomi.com>
Date: Thu, 9 Sep 2021 11:38:03 +0800
Subject: [PATCH] vfs/poll: correct the return event if inode has closed

Signed-off-by: chao.an <anchao@xiaomi.com>
---
 fs/vfs/fs_poll.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/vfs/fs_poll.c b/fs/vfs/fs_poll.c
index 31967b90d0c..11a4a4b44d9 100644
--- a/fs/vfs/fs_poll.c
+++ b/fs/vfs/fs_poll.c
@@ -299,7 +299,7 @@ int file_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup)
   FAR struct inode *inode;
   int ret = -ENOSYS;
 
-  DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
+  DEBUGASSERT(filep != NULL);
   inode = filep->f_inode;
 
   if (inode != NULL)
@@ -337,6 +337,13 @@ int file_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup)
           ret = OK;
         }
     }
+  else
+    {
+      fds->revents |= (POLLERR | POLLHUP);
+      nxsem_post(fds->sem);
+
+      ret = OK;
+    }
 
   return ret;
 }