[SCSI] qla2xxx: Correct several PCI-EEH issues.

In addition to checking for potentially unnecessary iomem
readX()/writeX() operations, a pci_channel_io_perm_failure should
not trigger a full internal removal.  Found during additional
testing with pSeries blade systems.
Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -1282,6 +1282,9 @@ qla2x00_dev_loss_tmo_callbk(struct fc_rport *rport)
 	if (!fcport)
 		return;
 
+	if (unlikely(pci_channel_offline(fcport->vha->hw->pdev)))
+		qla2x00_abort_all_cmds(fcport->vha, DID_NO_CONNECT << 16);
+	else
 		qla2x00_abort_fcport_cmds(fcport);
 
 	/*
@@ -1302,6 +1305,10 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
 	if (!fcport)
 		return;
 
+	if (unlikely(pci_channel_offline(fcport->vha->hw->pdev))) {
+		qla2x00_abort_all_cmds(fcport->vha, DID_NO_CONNECT << 16);
+		return;
+	}
 	/*
 	 * At this point all fcport's software-states are cleared.  Perform any
 	 * final cleanup of firmware resources (PCBs and XCBs).

drivers/scsi/qla2xxx/qla_mbx.c

@@ -45,6 +45,9 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 	struct qla_hw_data *ha = vha->hw;
 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 
+	if (ha->pdev->error_state > pci_channel_io_frozen)
+		return QLA_FUNCTION_TIMEOUT;
+
 	reg = ha->iobase;
 	io_lock_on = base_vha->flags.init_done;
 

drivers/scsi/qla2xxx/qla_os.c

@@ -407,7 +407,10 @@ qla2xxx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 	int rval;
 
 	if (unlikely(pci_channel_offline(ha->pdev))) {
+		if (ha->pdev->error_state == pci_channel_io_frozen)
 			cmd->result = DID_REQUEUE << 16;
+		else
+			cmd->result = DID_NO_CONNECT << 16;
 		goto qc24_fail_command;
 	}
 
@@ -2990,6 +2993,8 @@ qla2x00_release_firmware(void)
 static pci_ers_result_t
 qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 {
+	scsi_qla_host_t *base_vha = pci_get_drvdata(pdev);
+
 	switch (state) {
 	case pci_channel_io_normal:
 		return PCI_ERS_RESULT_CAN_RECOVER;
@@ -2997,7 +3002,7 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 		pci_disable_device(pdev);
 		return PCI_ERS_RESULT_NEED_RESET;
 	case pci_channel_io_perm_failure:
-		qla2x00_remove_one(pdev);
+		qla2x00_abort_all_cmds(base_vha, DID_NO_CONNECT << 16);
 		return PCI_ERS_RESULT_DISCONNECT;
 	}
 	return PCI_ERS_RESULT_NEED_RESET;