[SCSI] iscsi lib: have lib create work queue for transmitting IO

We were using the shost work queue which ended up being
a little akward since all iscsi hosts need a thread for
scanning, but only drivers hooked into libiscsi need
a workqueue for transmitting. So this patch moves the
xmit workqueue to the lib.

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

drivers/infiniband/ulp/iser/iscsi_iser.c

@@ -404,7 +404,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
 	struct Scsi_Host *shost;
 	struct iser_conn *ib_conn;
 
-	shost = iscsi_host_alloc(&iscsi_iser_sht, 0, ISER_DEF_CMD_PER_LUN);
+	shost = iscsi_host_alloc(&iscsi_iser_sht, 0, ISER_DEF_CMD_PER_LUN, 1);
 	if (!shost)
 		return NULL;
 	shost->transportt = iscsi_iser_scsi_transport;

drivers/infiniband/ulp/iser/iser_initiator.c

@@ -661,7 +661,7 @@ void iser_snd_completion(struct iser_desc *tx_desc)
 
 	if (resume_tx) {
 		iser_dbg("%ld resuming tx\n",jiffies);
-		scsi_queue_work(conn->session->host, &conn->xmitwork);
+		iscsi_conn_queue_work(conn);
 	}
 
 	if (tx_desc->type == ISCSI_TX_CONTROL) {