CIFS: Always reset read error to -EIO if no response

Currently we skip setting a read error to -EIO if a stored
result is -ENODATA and a response hasn't been received. With
the recent changes in read error processing there shouldn't be
cases when -ENODATA is set without a response from the server,
so reset the error to -EIO unconditionally.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smb2pdu.c

@@ -3236,8 +3236,7 @@ smb2_readv_callback(struct mid_q_entry *mid)
 		credits_received = le16_to_cpu(shdr->CreditRequest);
 		/* fall through */
 	default:
-		if (rdata->result != -ENODATA)
-			rdata->result = -EIO;
+		rdata->result = -EIO;
 	}
 #ifdef CONFIG_CIFS_SMB_DIRECT
 	/*