[SCSI] iscsi bugfixes: send correct error values to userspace

In the xmit patch we are sending a -EXXX value to iscsi_conn_failure
which is causing userspace to get confused.

We should be sending a ISCSI_ERR_* value that userspace understands.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/iscsi_tcp.c

@@ -843,7 +843,7 @@ more:
 		       if (rc == -EAGAIN)
 				goto nomore;
 		       else {
-				iscsi_conn_failure(conn, rc);
+				iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
 				return 0;
 		       }
 		}
@@ -859,7 +859,7 @@ more:
 			}
 			tcp_conn->in_progress = IN_PROGRESS_DATA_RECV;
 		} else if (rc) {
-			iscsi_conn_failure(conn, rc);
+			iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
 			return 0;
 		}
 	}
@@ -897,7 +897,7 @@ more:
 		if (rc) {
 			if (rc == -EAGAIN)
 				goto again;
-			iscsi_conn_failure(conn, rc);
+			iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
 			return 0;
 		}
 		tcp_conn->in.copy -= tcp_conn->in.padding;