From 5e95e731115c391d36868cd36f499a8ce16c7959 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" <martin.petersen@oracle.com> Date: Tue, 28 Aug 2012 14:29:37 -0400 Subject: [SCSI] mpt2sas: Add a module parameter that permits overriding protection capabilities Add a parameter that allows the host protection capabilities mask to be provided at module load time. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: "Sreekanth Reddy" <Sreekanth.reddy@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com> --- drivers/scsi/mpt2sas/mpt2sas_scsih.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/mpt2sas') diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c index bfda0ecd960d..96f4d1f1cf5e 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c @@ -123,6 +123,11 @@ static int disable_discovery = -1; module_param(disable_discovery, int, 0); MODULE_PARM_DESC(disable_discovery, " disable discovery "); +/* permit overriding the host protection capabilities mask (EEDP/T10 PI) */ +static int prot_mask = 0; +module_param(prot_mask, int, 0); +MODULE_PARM_DESC(prot_mask, " host protection capabilities mask, def=7 "); + /** * struct sense_info - common structure for obtaining sense keys * @skey: sense key @@ -8088,8 +8093,14 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id) goto out_add_shost_fail; } - scsi_host_set_prot(shost, SHOST_DIF_TYPE1_PROTECTION - | SHOST_DIF_TYPE2_PROTECTION | SHOST_DIF_TYPE3_PROTECTION); + /* register EEDP capabilities with SCSI layer */ + if (prot_mask) + scsi_host_set_prot(shost, prot_mask); + else + scsi_host_set_prot(shost, SHOST_DIF_TYPE1_PROTECTION + | SHOST_DIF_TYPE2_PROTECTION + | SHOST_DIF_TYPE3_PROTECTION); + scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC); /* event thread */ -- cgit v1.2.3-70-g09d2