smb: server: smb_direct_disconnect_rdma_connection() already wakes all waiters on error

There's no need to care about pending or credit counters when we
already disconnecting.

And all related wait_event conditions already check for broken
connections too.

This will simplify the code and makes the following changes simpler.

Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: metze-samba

fs/smb/server/transport_rdma.c

@@ -987,8 +987,6 @@ static int smb_direct_post_send(struct smbdirect_socket *sc,
 	ret = ib_post_send(sc->ib.qp, wr, NULL);
 	if (ret) {
 		pr_err("failed to post send: %d\n", ret);
-		if (atomic_dec_and_test(&sc->send_io.pending.count))
-			wake_up(&sc->send_io.pending.zero_wait_queue);
 		smb_direct_disconnect_rdma_connection(sc);
 	}
 	return ret;
@@ -1037,8 +1035,6 @@ static int smb_direct_flush_send_list(struct smbdirect_socket *sc,
 					 send_ctx->need_invalidate_rkey,
 					 send_ctx->remote_key);
 	} else {
-		atomic_add(send_ctx->wr_cnt, &sc->send_io.credits.count);
-		wake_up(&sc->send_io.credits.wait_queue);
 		list_for_each_entry_safe(first, last, &send_ctx->msg_list,
 					 sibling_list) {
 			smb_direct_free_sendmsg(sc, first);