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[SCSI] ipr: fix synchronous request flags for better performance 

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>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Wayne Boyer 2011-03-31 09:56:10 -07:00 committed by James Bottomley
parent c9c2a14047
commit ab6c10b136
2 changed files with 3 additions and 2 deletions
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3
drivers/scsi/ipr.c
View File

@ -5773,7 +5773,8 @@ static int ipr_queuecommand_lck(struct scsi_cmnd *scsi_cmd,
}
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);
}

2
drivers/scsi/ipr.h
View File

@ -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