NFSv4.1 don't free interrupted slot on open

commit 0cb98abb5bd13b9a636bde603d952d722688b428 upstream.

Allow the async rpc task for finish and update the open state if needed,
then free the slot. Otherwise, the async rpc unable to decode the reply.
Signed-off-by: NOlga Kornievskaia <kolga@netapp.com>
Fixes: ae55e59d ("pnfs: Don't release the sequence slot...")
Cc: stable@vger.kernel.org # v4.18+
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: NJiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

fs/nfs/nfs4proc.c

@@ -2905,7 +2905,8 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
 	}
 
 out:
-	nfs4_sequence_free_slot(&opendata->o_res.seq_res);
+	if (!opendata->cancelled)
+		nfs4_sequence_free_slot(&opendata->o_res.seq_res);
 	return ret;
 }