smb: client: remove pointless sc->recv_io.credits.count rollback

We either reach this code path before we call
new_credits = manage_credits_prior_sending(sc),
which means new_credits is still 0
or the connection is already broken as
smbd_post_send() already called
smbd_disconnect_rdma_connection().

This will also simplify further changes.

Cc: <stable@vger.kernel.org> # 6.18.x
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c
index f2ae35a9f047f59049ee8bef591b03a79297eead..c9fcd35e0c77aac579240e2faaccedf37dfa759a 100644 (file)
--- a/fs/smb/client/smbdirect.c
+++ b/fs/smb/client/smbdirect.c
@@ -1288,9 +1288,6 @@ err_dma:
                                            DMA_TO_DEVICE);
        mempool_free(request, sc->send_io.mem.pool);
 
-       /* roll back the granted receive credits */
-       atomic_sub(new_credits, &sc->recv_io.credits.count);
-
 err_alloc:
        atomic_inc(&sc->send_io.credits.count);
        wake_up(&sc->send_io.credits.wait_queue);