[PATCH 03/20] smartpqi: add no_write_same for logical volumes

[Don Brace]

From: Dave Carroll <david.carr...@microsemi.com>

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.ko...@microsemi.com>
Reviewed-by: Murthy Bhat <murthy.b...@microsemi.com>
Reviewed-by: Mahesh Rajashekhara <mahesh.rajashekh...@microsemi.com>
Reviewed-by: Justin Lindley <justin.lind...@microsemi.com>
Reviewed-by: Scott Benesh <scott.ben...@microsemi.com>
Reviewed-by: Scott Teel <scott.t...@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barn...@microsemi.com>
Signed-off-by: Dave Carroll <david.carr...@microsemi.com>
Signed-off-by: Don Brace <don.br...@microsemi.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 db95b1cb6889..8e68dba1c789 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);