From: Sawan Chandak <sawan.chandak@qlogic.com>
Date: Wed, 6 Jul 2016 15:14:32 +0000 (-0400)
Subject: qla2xxx: Disable the adapter and skip error recovery in case of register disconnect.
X-Git-Tag: v4.8-rc1~132^2~12
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a465537ad1a4;p=karo-tx-linux.git

qla2xxx: Disable the adapter and skip error recovery in case of register disconnect.

If there is error recovery going on due to command timeout and
there is register disconnect, then disable the adapter.

Signed-off-by: Sawan Chandak <sawan.chandak@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 8b06ce8fbb0f..fe7469c901f7 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1769,6 +1769,9 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
 	if (!fcport)
 		return;
 
+	if (test_bit(UNLOADING, &fcport->vha->dpc_flags))
+		return;
+
 	if (test_bit(ABORT_ISP_ACTIVE, &fcport->vha->dpc_flags))
 		return;
 
diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index 1a042702d34a..97b0a9da0913 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -41,7 +41,7 @@
  * |                              |                    | 0x70ad-0x70ae  |
  * |                              |                    | 0x70d0-0x70d6	|
  * |                              |                    | 0x70d7-0x70db  |
- * | Task Management              |       0x803d       | 0x8000,0x800b  |
+ * | Task Management              |       0x8042       | 0x8000,0x800b  |
  * |                              |                    | 0x8019         |
  * |                              |                    | 0x8025,0x8026  |
  * |                              |                    | 0x8031,0x8032  |
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index dc7e58315870..2674f4c16bc3 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -943,6 +943,30 @@ sp_get(struct srb *sp)
 	atomic_inc(&sp->ref_count);
 }
 
+#define ISP_REG_DISCONNECT 0xffffffffU
+/**************************************************************************
+* qla2x00_isp_reg_stat
+*
+* Description:
+*	Read the host status register of ISP before aborting the command.
+*
+* Input:
+*	ha = pointer to host adapter structure.
+*
+*
+* Returns:
+*	Either true or false.
+*
+* Note:	Return true if there is register disconnect.
+**************************************************************************/
+static inline
+uint32_t qla2x00_isp_reg_stat(struct qla_hw_data *ha)
+{
+	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+
+	return ((RD_REG_DWORD(&reg->host_status)) == ISP_REG_DISCONNECT);
+}
+
 /**************************************************************************
 * qla2xxx_eh_abort
 *
@@ -970,6 +994,11 @@ qla2xxx_eh_abort(struct scsi_cmnd *cmd)
 	int rval, wait = 0;
 	struct qla_hw_data *ha = vha->hw;
 
+	if (qla2x00_isp_reg_stat(ha)) {
+		ql_log(ql_log_info, vha, 0x8042,
+		    "PCI/Register disconnect, exiting.\n");
+		return FAILED;
+	}
 	if (!CMD_SP(cmd))
 		return SUCCESS;
 
@@ -1153,6 +1182,12 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
 	scsi_qla_host_t *vha = shost_priv(cmd->device->host);
 	struct qla_hw_data *ha = vha->hw;
 
+	if (qla2x00_isp_reg_stat(ha)) {
+		ql_log(ql_log_info, vha, 0x803e,
+		    "PCI/Register disconnect, exiting.\n");
+		return FAILED;
+	}
+
 	return __qla2xxx_eh_generic_reset("DEVICE", WAIT_LUN, cmd,
 	    ha->isp_ops->lun_reset);
 }
@@ -1163,6 +1198,12 @@ qla2xxx_eh_target_reset(struct scsi_cmnd *cmd)
 	scsi_qla_host_t *vha = shost_priv(cmd->device->host);
 	struct qla_hw_data *ha = vha->hw;
 
+	if (qla2x00_isp_reg_stat(ha)) {
+		ql_log(ql_log_info, vha, 0x803f,
+		    "PCI/Register disconnect, exiting.\n");
+		return FAILED;
+	}
+
 	return __qla2xxx_eh_generic_reset("TARGET", WAIT_TARGET, cmd,
 	    ha->isp_ops->target_reset);
 }
@@ -1190,6 +1231,13 @@ qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
 	int ret = FAILED;
 	unsigned int id;
 	uint64_t lun;
+	struct qla_hw_data *ha = vha->hw;
+
+	if (qla2x00_isp_reg_stat(ha)) {
+		ql_log(ql_log_info, vha, 0x8040,
+		    "PCI/Register disconnect, exiting.\n");
+		return FAILED;
+	}
 
 	id = cmd->device->id;
 	lun = cmd->device->lun;
@@ -1259,6 +1307,13 @@ qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
 	uint64_t lun;
 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 
+	if (qla2x00_isp_reg_stat(ha)) {
+		ql_log(ql_log_info, vha, 0x8041,
+		    "PCI/Register disconnect, exiting.\n");
+		schedule_work(&ha->board_disable);
+		return SUCCESS;
+	}
+
 	id = cmd->device->id;
 	lun = cmd->device->lun;