---

yaml
---
r: 328759
b: refs/heads/master
c: 4b19317
h: refs/heads/master
i:
  328757: e8a8641
  328755: d81a08d
  328751: c13ae69
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8c79d6267b5dbf98e1b275e3e3b74f3467ba618a
+refs/heads/master: 4b193175364ac2c31999f0e571df02a6b9315c8c

trunk/drivers/scsi/mpt2sas/mpt2sas_scsih.c

@@ -119,6 +119,10 @@ module_param(diag_buffer_enable, int, 0);
 MODULE_PARM_DESC(diag_buffer_enable, " post diag buffers "
 	"(TRACE=1/SNAPSHOT=2/EXTENDED=4/default=0)");
 
+static int disable_discovery = -1;
+module_param(disable_discovery, int, 0);
+MODULE_PARM_DESC(disable_discovery, " disable discovery ");
+
 /**
  * struct sense_info - common structure for obtaining sense keys
  * @skey: sense key
@@ -5973,8 +5977,14 @@ _scsih_sas_discovery_event(struct MPT2SAS_ADAPTER *ioc,
 #endif
 
 	if (event_data->ReasonCode == MPI2_EVENT_SAS_DISC_RC_STARTED &&
-	    !ioc->sas_hba.num_phys)
+	    !ioc->sas_hba.num_phys) {
+		if (disable_discovery > 0 && ioc->shost_recovery) {
+			/* Wait for the reset to complete */
+			while (ioc->shost_recovery)
+				ssleep(1);
+		}
 		_scsih_sas_host_add(ioc);
+	}
 }
 
 /**
@@ -7929,6 +7939,9 @@ _scsih_scan_start(struct Scsi_Host *shost)
 	if (diag_buffer_enable != -1 && diag_buffer_enable != 0)
 		mpt2sas_enable_diag_buffer(ioc, diag_buffer_enable);
 
+	if (disable_discovery > 0)
+		return;
+
 	ioc->start_scan = 1;
 	rc = mpt2sas_port_enable(ioc);
 
@@ -7950,6 +7963,12 @@ _scsih_scan_finished(struct Scsi_Host *shost, unsigned long time)
 {
 	struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
 
+	if (disable_discovery > 0) {
+		ioc->is_driver_loading = 0;
+		ioc->wait_for_discovery_to_complete = 0;
+		return 1;
+	}
+
 	if (time >= (300 * HZ)) {
 		ioc->base_cmds.status = MPT2_CMD_NOT_USED;
 		printk(MPT2SAS_INFO_FMT "port enable: FAILED with timeout "