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authorHimanshu Madhani <himanshu.madhani@qlogic.com>2014-09-25 14:14:59 +0400
committerChristoph Hellwig <hch@lst.de>2014-09-25 16:25:08 +0400
commit63163e060127876f57c327c85f2890ed427a4907 (patch)
tree42494fcc3c8b9fec4fe6474bb753d640bbc54350 /drivers/scsi/qla2xxx
parente07f8f6547c246936b489772717b05695af53e35 (diff)
downloadlinux-63163e060127876f57c327c85f2890ed427a4907.tar.xz
qla2xxx: Add memory barrier before ringing doorbell.
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/qla2xxx')
-rw-r--r--drivers/scsi/qla2xxx/qla_target.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index f3287e1bc554..829752cfd73f 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1040,6 +1040,8 @@ static void qlt_send_notify_ack(struct scsi_qla_host *vha,
"qla_target(%d): Sending 24xx Notify Ack %d\n",
vha->vp_idx, nack->u.isp24.status);
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
}
@@ -1117,6 +1119,8 @@ static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
vha->vha_tgt.qla_tgt->abts_resp_expected++;
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
}
@@ -1162,6 +1166,8 @@ static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
CTIO7_FLAGS_TERMINATE);
ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
@@ -1333,6 +1339,8 @@ static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
ctio->u.status1.response_len = __constant_cpu_to_le16(8);
ctio->u.status1.sense_data[0] = resp_code;
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(ha, ha->req);
}
@@ -2412,6 +2420,8 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
cmd->cmd_sent_to_fw = 1;
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
@@ -2488,6 +2498,8 @@ int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
cmd->state = QLA_TGT_STATE_NEED_DATA;
cmd->cmd_sent_to_fw = 1;
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
@@ -2696,6 +2708,8 @@ static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
if (ctio24->u.status1.residual != 0)
ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
return ret;
}
@@ -4329,6 +4343,8 @@ static int __qlt_send_busy(struct scsi_qla_host *vha,
*/
ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
ctio24->u.status1.scsi_status = cpu_to_le16(status);
+ /* Memory Barrier */
+ wmb();
qla2x00_start_iocbs(vha, vha->req);
return 0;
}