scsi: ibmvscsi: add vscsi hosts to global list_head

Add each vscsi host adatper to a new global list_head named
ibmvscsi_head. There is no functional change. This is meant primarily as
a convience for locating adapters from within the debugger or crash
utility.

[mkp: fixed typo]

Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h
index e0f6c3a..3a78755 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.h
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.h
@@ -90,6 +90,7 @@ struct event_pool {
 
 /* all driver data associated with a host adapter */
 struct ibmvscsi_host_data {
+	struct list_head host_list;
 	atomic_t request_limit;
 	int client_migrated;
 	int reset_crq;