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[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>
This commit is contained in:
Martin K. Petersen 2012-08-28 14:29:37 -04:00 committed by James Bottomley
parent 9b5cd13249
commit 5e95e73111
1 changed files with 13 additions and 2 deletions
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15
drivers/scsi/mpt2sas/mpt2sas_scsih.c
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@ -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 */