This patch provides a command line option to disable "Port enable" during
the driver load.
The objective of this command line option is to load the driver and do
all the necessary initialization excluding port enable(i.e. delay
device discovery)
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@xxxxxxx>
---
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 3e231a7..7a69a5c 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/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 "
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
