[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>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index bfda0ec..96f4d1f 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -123,6 +123,11 @@
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 @@
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 */