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qla2xxx: Add memory barrier before ringing doorbell.

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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>
This commit is contained in:
Himanshu Madhani 2014-09-25 06:14:59 -04:00 committed by Christoph Hellwig
parent e07f8f6547
commit 63163e0601
1 changed files with 16 additions and 0 deletions
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16
drivers/scsi/qla2xxx/qla_target.c
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@ -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;
}