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authorWendy Xiong <wenxiong@linux.vnet.ibm.com>2014-01-21 22:16:39 +0400
committerJames Bottomley <JBottomley@Parallels.com>2014-03-20 02:04:38 +0400
commit0b1f8d445b8cc5ac58786334f1ddaefa09fdf096 (patch)
treea65f9408d454819c1a8592e5721f1460bd9eeeef /drivers
parent0759c666a39f16ab3a42d37b1e8fb0f246f97f52 (diff)
downloadlinux-0b1f8d445b8cc5ac58786334f1ddaefa09fdf096.tar.xz
[SCSI] ipr: Remove extended delay bit on GSCSI reads/writes ops
This patch removes extended delay bit on GSCSI reads/writes ops, the performance will be significanly better. Signed-off-by: Wen Xiong <wenxiong@linux.vnet.ibm.com> Acked-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/ipr.c6
-rw-r--r--drivers/scsi/ipr.h1
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 3f5b56a99892..7e1276a35e41 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -1143,6 +1143,7 @@ static void ipr_init_res_entry(struct ipr_resource_entry *res,
res->add_to_ml = 0;
res->del_from_ml = 0;
res->resetting_device = 0;
+ res->reset_occurred = 0;
res->sdev = NULL;
res->sata_port = NULL;
@@ -5015,6 +5016,7 @@ static int __ipr_eh_dev_reset(struct scsi_cmnd *scsi_cmd)
} else
rc = ipr_device_reset(ioa_cfg, res);
res->resetting_device = 0;
+ res->reset_occurred = 1;
LEAVE;
return rc ? FAILED : SUCCESS;
@@ -6183,8 +6185,10 @@ static int ipr_queuecommand(struct Scsi_Host *shost,
ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
- if (ipr_is_gscsi(res))
+ if (ipr_is_gscsi(res) && res->reset_occurred) {
+ res->reset_occurred = 0;
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);
}
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 9ce38a22647e..f66645c73492 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -1252,6 +1252,7 @@ struct ipr_resource_entry {
u8 add_to_ml:1;
u8 del_from_ml:1;
u8 resetting_device:1;
+ u8 reset_occurred:1;
u32 bus; /* AKA channel */
u32 target; /* AKA id */