scsi: aacraid: Fix PD performance regression over incorrect qd being set

commit 59b433c825569ce251371485f0e29fca888b549d upstream.

The driver fails to set the correct queue depth for native devices, due to
failing to set the device type prior to calling aac_set_safw_target_qd().
This results in slave configure setting the queue depth to 1.

This causes around 30% performance degradation. Fixed by setting the dev
type before trying to set queue depth.

Reported-by: Steve Best <sbest@redhat.com>
Fixes: 0bcb45fb20c21 ("scsi: aacraid: Add helper function to set queue depth")
cc: stable@vger.kernel.org
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <David.Carroll@microsemi.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index e7961cbd2c55ab81020084730e8ec19f45aeda7d..1d20aad3aa92b362cd82ef7cf91282c0fa4ac7b0 100644 (file)
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -1974,7 +1974,6 @@ static void aac_set_safw_attr_all_targets(struct aac_dev *dev)
        u32 lun_count, nexus;
        u32 i, bus, target;
        u8 expose_flag, attribs;
-       u8 devtype;
 
        lun_count = aac_get_safw_phys_lun_count(dev);
 
@@ -1992,23 +1991,23 @@ static void aac_set_safw_attr_all_targets(struct aac_dev *dev)
                        continue;
 
                if (expose_flag != 0) {
-                       devtype = AAC_DEVTYPE_RAID_MEMBER;
-                       goto update_devtype;
+                       dev->hba_map[bus][target].devtype =
+                               AAC_DEVTYPE_RAID_MEMBER;
+                       continue;
                }
 
                if (nexus != 0 && (attribs & 8)) {
-                       devtype = AAC_DEVTYPE_NATIVE_RAW;
+                       dev->hba_map[bus][target].devtype =
+                               AAC_DEVTYPE_NATIVE_RAW;
                        dev->hba_map[bus][target].rmw_nexus =
                                        nexus;
                } else
-                       devtype = AAC_DEVTYPE_ARC_RAW;
+                       dev->hba_map[bus][target].devtype =
+                               AAC_DEVTYPE_ARC_RAW;
 
                dev->hba_map[bus][target].scan_counter = dev->scan_counter;
 
                aac_set_safw_target_qd(dev, bus, target);
-
-update_devtype:
-               dev->hba_map[bus][target].devtype = devtype;
        }
 }