[PATCH 1/1] ipr: fix synchronous request flags for better performance

[Wayne Boyer <wayneb@linux.vnet.ibm.com>]

In testing it was noticed that Extended Delay after Reset flag was being set
for gscsi and volume set devices.  This had a negative effect on performance
for volume sets.  The fix is to only set the flag for gscsi devices.

Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
---

 drivers/scsi/ipr.c |    3 ++-
 drivers/scsi/ipr.h |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

Index: b/drivers/scsi/ipr.c
===================================================================
--- a/drivers/scsi/ipr.c	2011-03-31 09:48:18.998471040 -0700
+++ b/drivers/scsi/ipr.c	2011-03-31 09:48:50.318094131 -0700
@@ -5773,7 +5773,8 @@ static int ipr_queuecommand_lck(struct s
 		}

 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
-		ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
+		if (ipr_is_gscsi(res))
+			ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
 		ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_ALIGNED_BFR;
 		ioarcb->cmd_pkt.flags_lo |= ipr_get_task_attributes(scsi_cmd);
 	}
Index: b/drivers/scsi/ipr.h
===================================================================
--- a/drivers/scsi/ipr.h	2011-03-31 09:48:20.438637636 -0700
+++ b/drivers/scsi/ipr.h	2011-03-31 09:49:19.381456240 -0700
@@ -474,7 +474,7 @@ struct ipr_cmd_pkt {

 	u8 flags_lo;
 #define IPR_FLAGS_LO_ALIGNED_BFR		0x20
-#define IPR_FLAGS_LO_DELAY_AFTER_RST	0x10
+#define IPR_FLAGS_LO_DELAY_AFTER_RST		0x10
 #define IPR_FLAGS_LO_UNTAGGED_TASK		0x00
 #define IPR_FLAGS_LO_SIMPLE_TASK		0x02
 #define IPR_FLAGS_LO_ORDERED_TASK		0x04