[SCSI] ipr: Module parm to disable RAID 0 auto create

Some ipr adapters will automatically create single device
RAID 0 arrays for all unconfigured RAID capable devices found
at adapter initialization time. This patch adds a module parameter
to disable this behavior.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/ipr.c

@@ -93,6 +93,7 @@ static unsigned int ipr_fastfail = 0;
 static unsigned int ipr_transop_timeout = IPR_OPERATIONAL_TIMEOUT;
 static unsigned int ipr_enable_cache = 1;
 static unsigned int ipr_debug = 0;
+static int ipr_auto_create = 1;
 static DEFINE_SPINLOCK(ipr_driver_lock);
 
 /* This table describes the differences between DMA controller chips */
@@ -156,6 +157,8 @@ module_param_named(enable_cache, ipr_enable_cache, int, 0);
 MODULE_PARM_DESC(enable_cache, "Enable adapter's non-volatile write cache (default: 1)");
 module_param_named(debug, ipr_debug, int, 0);
 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
+module_param_named(auto_create, ipr_auto_create, int, 0);
+MODULE_PARM_DESC(auto_create, "Auto-create single device RAID 0 arrays when initialized (default: 1)");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(IPR_DRIVER_VERSION);
 
@@ -5919,6 +5922,8 @@ static void __devinit ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg,
 	ioa_cfg->pdev = pdev;
 	ioa_cfg->log_level = ipr_log_level;
 	ioa_cfg->doorbell = IPR_DOORBELL;
+	if (!ipr_auto_create)
+		ioa_cfg->doorbell |= IPR_RUNTIME_RESET;
 	sprintf(ioa_cfg->eye_catcher, IPR_EYECATCHER);
 	sprintf(ioa_cfg->trace_start, IPR_TRACE_START_LABEL);
 	sprintf(ioa_cfg->ipr_free_label, IPR_FREEQ_LABEL);