From: Kashyap, Desai Date: Thu, 17 Jun 2010 08:01:17 +0000 (+0530) Subject: [SCSI] mpt2sas: staged device discovery. disable_discovery module parameter is added. X-Git-Tag: firefly_0821_release~9833^2~1305^2~183 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dd5fd3323abcb799d4d81f3c4b3e2a5fcbfce7bf;p=firefly-linux-kernel-4.4.55.git [SCSI] mpt2sas: staged device discovery. disable_discovery module parameter is added. Added command line option called disable_discovery. When enabled on the command line, the driver will not send a port_enable when loaded for the first time. If port_enable is not called, then there is no discovery of devices, as well as the sas topology. Then later if one desires to invoke discovery, then they will need to issue a diagnostic reset. A diagnostic reset can be issued various ways. One of the way is throught sysfs. Signed-off-by: Kashyap Desai Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index f0c0df4278d7..68cb000bf486 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -95,6 +95,10 @@ int mpt2sas_fwfault_debug; MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault " "and halt firmware - (default=0)"); +static int disable_discovery = -1; +module_param(disable_discovery, int, 0); +MODULE_PARM_DESC(disable_discovery, " disable discovery "); + /** * _scsih_set_fwfault_debug - global setting of ioc->fwfault_debug. * @@ -3520,6 +3524,9 @@ _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, int sleep_flag) if (sleep_flag == CAN_SLEEP) _base_static_config_pages(ioc); + if (ioc->wait_for_port_enable_to_complete && disable_discovery > 0) + return r; + r = _base_send_port_enable(ioc, sleep_flag); if (r) return r;