diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 93e0a2404532..c757c1c3cb81 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -606,3 +606,10 @@ in your dentry operations instead.
 	dentry separately, and it now has request_mask and query_flags arguments
 	to specify the fields and sync type requested by statx.  Filesystems not
 	supporting any statx-specific features may ignore the new arguments.
+--
+[mandatory]
+
+	[should've been added in 2016] stale comment in finish_open()
+	nonwithstanding, failure exits in ->atomic_open() instances should
+	*NOT* fput() the file, no matter what.  Everything is handled by the
+	caller.
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index f00a7ce3eb6e..03293e543c07 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -562,7 +562,6 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 		if (server->ops->close)
 			server->ops->close(xid, tcon, &fid);
 		cifs_del_pending_open(&open);
-		fput(file);
 		rc = -ENOMEM;
 	}
 
diff --git a/fs/open.c b/fs/open.c
index 29a2cdcbcb17..49fd070be0ec 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -824,9 +824,6 @@ cleanup_file:
  * the return value of d_splice_alias(), then the caller needs to perform dput()
  * on it after finish_open().
  *
- * On successful return @file is a fully instantiated open file.  After this, if
- * an error occurs in ->atomic_open(), it needs to clean up with fput().
- *
  * Returns zero on success or -errno if the open failed.
  */
 int finish_open(struct file *file, struct dentry *dentry,