From: Dave Carroll <david.carroll@microsemi.com>
Date: Fri, 7 Dec 2018 16:28:23 -0600
Subject: scsi: smartpqi: add no_write_same for logical volumes
Git-commit: b6e2ef67ed8365d60a0cebc1313b57df8b9e909e
Patch-mainline: v5.0-rc1
References: bsc#1133547

During slave_alloc, for logical volumes include no_write_same into the
scsi_device structure. This will insure that WRITE_SAME will not be used
for LD's.

Reviewed-by: Ajish Koshy <ajish.koshy@microsemi.com>
Reviewed-by: Murthy Bhat <murthy.bhat@microsemi.com>
Reviewed-by: Mahesh Rajashekhara <mahesh.rajashekhara@microsemi.com>
Reviewed-by: Justin Lindley <justin.lindley@microsemi.com>
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Dave Carroll <david.carroll@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 0f28ce5ff32b..591787b46333 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -176,6 +176,11 @@ static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 	scmd->scsi_done(scmd);
 }
 
+static inline void pqi_disable_write_same(struct scsi_device *sdev)
+{
+	sdev->no_write_same = 1;
+}
+
 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 {
 	return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
@@ -5326,6 +5331,8 @@ static int pqi_slave_alloc(struct scsi_device *sdev)
 			scsi_change_queue_depth(sdev,
 				device->advertised_queue_depth);
 		}
+		if (pqi_is_logical_device(device))
+			pqi_disable_write_same(sdev);
 	}
 
 	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);