storvsc: in responce to a scan event, scan the host

The virtual HBA that storvsc implements can support multiple channels and
targets. So, scan the host when the host notifies that a scan is needed.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/storvsc_drv.c

@@ -410,21 +410,16 @@ done:
 	kfree(wrk);
 }
 
-static void storvsc_bus_scan(struct work_struct *work)
+static void storvsc_host_scan(struct work_struct *work)
 {
 	struct storvsc_scan_work *wrk;
-	int id, order_id;
+	struct Scsi_Host *host;
 
 	wrk = container_of(work, struct storvsc_scan_work, work);
-	for (id = 0; id < wrk->host->max_id; ++id) {
-		if (wrk->host->reverse_ordering)
-			order_id = wrk->host->max_id - id - 1;
-		else
-			order_id = id;
-
-		scsi_scan_target(&wrk->host->shost_gendev, 0,
-				order_id, SCAN_WILD_CARD, 1);
-	}
+	host = wrk->host;
+
+	scsi_scan_host(host);
+
 	kfree(wrk);
 }
 
@@ -1173,7 +1168,7 @@ static void storvsc_on_receive(struct hv_device *device,
 		if (!work)
 			return;
 
-		INIT_WORK(&work->work, storvsc_bus_scan);
+		INIT_WORK(&work->work, storvsc_host_scan);
 		work->host = stor_device->host;
 		schedule_work(&work->work);
 		break;