smb: client: don't wait for info->send_pending == 0 on error

We already called ib_drain_qp() before and that makes sure
send_done() was called with IB_WC_WR_FLUSH_ERR, but
didn't called atomic_dec_and_test(&sc->send_io.pending.count)

So we may never reach the info->send_pending == 0 condition.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Fixes: 5349ae5 ("smb: client: let send_done() cleanup before calling smbd_disconnect_rdma_connection()")
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: metze-samba

fs/smb/client/smbdirect.c

@@ -1337,10 +1337,6 @@ void smbd_destroy(struct TCP_Server_Info *server)
 	log_rdma_event(INFO, "cancelling idle timer\n");
 	cancel_delayed_work_sync(&info->idle_timer_work);
 
-	log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
-	wait_event(info->wait_send_pending,
-		atomic_read(&info->send_pending) == 0);
-
 	/* It's not possible for upper layer to get to reassembly */
 	log_rdma_event(INFO, "drain the reassembly queue\n");
 	do {
@@ -1986,7 +1982,11 @@ int smbd_send(struct TCP_Server_Info *server,
 	 */
 
 	wait_event(info->wait_send_pending,
-		atomic_read(&info->send_pending) == 0);
+		atomic_read(&info->send_pending) == 0 ||
+		sc->status != SMBDIRECT_SOCKET_CONNECTED);
+
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED && rc == 0)
+		rc = -EAGAIN;
 
 	return rc;
 }