[SCSI] iscsi_transport, qla4xxx: have class lookup host for drivers

We are going to be adding more host level sysfs attrs and
set_params, so this patch has them take a scsi_host instead
of either a scsi_host or host no.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Cc: David C Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

3 files changed, 21 insertions, 17 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 01308e7ef2ae..29cd4b90ebed 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -54,8 +54,9 @@ static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
 /*
  * iSCSI template entry points
  */
-static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
-                             uint32_t enable, struct sockaddr *dst_addr);
+static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
+                             enum iscsi_tgt_dscvr type, uint32_t enable,
+                             struct sockaddr *dst_addr);
 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
                                   enum iscsi_param param, char *buf);
 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
@@ -243,21 +244,15 @@ static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
         return len;
 }
 
-static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
-                             uint32_t enable, struct sockaddr *dst_addr)
+static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
+                             enum iscsi_tgt_dscvr type, uint32_t enable,
+                             struct sockaddr *dst_addr)
 {
         struct scsi_qla_host *ha;
-        struct Scsi_Host *shost;
         struct sockaddr_in *addr;
         struct sockaddr_in6 *addr6;
         int ret = 0;
 
-        shost = scsi_host_lookup(host_no);
-        if (IS_ERR(shost)) {
-                printk(KERN_ERR "Could not find host no %u\n", host_no);
-                return -ENODEV;
-        }
-
         ha = (struct scsi_qla_host *) shost->hostdata;
 
         switch (type) {
@@ -281,8 +276,6 @@ static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
         default:
                 ret = -ENOSYS;
         }
-
-        scsi_host_put(shost);
         return ret;
 }
 
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 1ba98d255fac..59287601bd41 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -945,15 +945,26 @@ static int
 iscsi_tgt_dscvr(struct iscsi_transport *transport,
                 struct iscsi_uevent *ev)
 {
+        struct Scsi_Host *shost;
         struct sockaddr *dst_addr;
+        int err;
 
         if (!transport->tgt_dscvr)
                 return -EINVAL;
 
+        shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
+        if (IS_ERR(shost)) {
+                printk(KERN_ERR "target discovery could not find host no %u\n",
+                       ev->u.tgt_dscvr.host_no);
+                return -ENODEV;
+        }
+
+
         dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
-        return transport->tgt_dscvr(ev->u.tgt_dscvr.type,
-                                    ev->u.tgt_dscvr.host_no,
-                                    ev->u.tgt_dscvr.enable, dst_addr);
+        err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
+                                   ev->u.tgt_dscvr.enable, dst_addr);
+        scsi_host_put(shost);
+        return err;
 }
 
 static int
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index e962c5357eef..902e69f0272c 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -127,7 +127,7 @@ struct iscsi_transport {
                            uint64_t *ep_handle);
         int (*ep_poll) (uint64_t ep_handle, int timeout_ms);
         void (*ep_disconnect) (uint64_t ep_handle);
-        int (*tgt_dscvr) (enum iscsi_tgt_dscvr type, uint32_t host_no,
+        int (*tgt_dscvr) (struct Scsi_Host *shost, enum iscsi_tgt_dscvr type,
                           uint32_t enable, struct sockaddr *dst_addr);
 };