epoll: Call poll_notify before unlock mutex

to avoid the race condition Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-11-11 14:53:38 +08:00 · 2022-11-11 14:53:38 +08:00 · b72be1ddbf
parent 7e8e5c10d1
commit b72be1ddbf
1 changed files with 1 additions and 1 deletions
--- a/fs/vfs/fs_epoll.c
+++ b/fs/vfs/fs_epoll.c
@ -366,8 +366,8 @@ int epoll_ctl(int epfd, int op, int fd, FAR struct epoll_event *ev)
        goto err;
    }

-  nxmutex_unlock(&eph->lock);
  poll_notify(&eph->poll, 1, POLLIN);
+  nxmutex_unlock(&eph->lock);
  return OK;

 err: