From 7b594131c4f38edeb13d8c6c0147949173c47013 Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@cs.wisc.edu>
Date: Sun, 17 Aug 2008 15:24:40 -0500
Subject: [PATCH] [SCSI] qla2xxx: return SCSI_MLQUEUE_TARGET_BUSY when driver
has detected rport error or race
If the fcport is not online then we do not want to block IO to all ports on
the host. We just want to stop IO on port not online, so we should be using
the SCSI_MLQUEUE_TARGET_BUSY return value.
For the case where we race with the rport memset initialization
we do not want the queuecommand to be called again so we can just use
SCSI_MLQUEUE_TARGET_BUSY for this.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Acked-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
drivers/scsi/qla2xxx/qla_os.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 3433441b956..2aed4721c0d 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -394,10 +394,8 @@ qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
}
/* Close window on fcport/rport state-transitioning. */
- if (fcport->drport) {
- cmd->result = DID_IMM_RETRY << 16;
- goto qc_fail_command;
- }
+ if (fcport->drport)
+ goto qc_target_busy;
if (atomic_read(&fcport->state) != FCS_ONLINE) {
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
@@ -405,7 +403,7 @@ qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
cmd->result = DID_NO_CONNECT << 16;
goto qc_fail_command;
}
- goto qc_host_busy;
+ goto qc_target_busy;
}
spin_unlock_irq(ha->host->host_lock);
@@ -428,10 +426,11 @@ qc_host_busy_free_sp:
qc_host_busy_lock:
spin_lock_irq(ha->host->host_lock);
-
-qc_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
+qc_target_busy:
+ return SCSI_MLQUEUE_TARGET_BUSY;
+
qc_fail_command:
done(cmd);
@@ -461,10 +460,8 @@ qla24xx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
}
/* Close window on fcport/rport state-transitioning. */
- if (fcport->drport) {
- cmd->result = DID_IMM_RETRY << 16;
- goto qc24_fail_command;
- }
+ if (fcport->drport)
+ goto qc24_target_busy;
if (atomic_read(&fcport->state) != FCS_ONLINE) {
if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
@@ -472,7 +469,7 @@ qla24xx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
cmd->result = DID_NO_CONNECT << 16;
goto qc24_fail_command;
}
- goto qc24_host_busy;
+ goto qc24_target_busy;
}
spin_unlock_irq(ha->host->host_lock);
@@ -495,10 +492,11 @@ qc24_host_busy_free_sp:
qc24_host_busy_lock:
spin_lock_irq(ha->host->host_lock);
-
-qc24_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
+qc24_target_busy:
+ return SCSI_MLQUEUE_TARGET_BUSY;
+
qc24_fail_command:
done(cmd);
--
2.41.3