cifs: smbd: Retry on memory registration failure

Memory registration failure doesn't mean this I/O has failed, it means the
transport is hitting I/O error or needs reconnect. This error is not from
the server.

Indicate this error to upper layer, and let upper layer decide how to
reconnect and proceed with this I/O.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index a37774a55f3a..36cc34318429 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3223,7 +3223,7 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
                                 rdata->nr_pages, rdata->page_offset,
                                 rdata->tailsz, true, need_invalidate);
                 if (!rdata->mr)
-                        return -ENOBUFS;
+                        return -EAGAIN;
 
                 req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
                 if (need_invalidate)
@@ -3628,7 +3628,7 @@ smb2_async_writev(struct cifs_writedata *wdata,
                                 wdata->nr_pages, wdata->page_offset,
                                 wdata->tailsz, false, need_invalidate);
                 if (!wdata->mr) {
-                        rc = -ENOBUFS;
+                        rc = -EAGAIN;
                         goto async_writev_out;
                 }
                 req->Length = 0;