be2iscsi: Fix to remove shutdown entry point

Null pointer dereference in shutdown path after taking dump.

Shutdown path is not needed as FW comes up clean every time during probe
after issuing FUNCTION reset MBOX command.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_cmds.c

@@ -417,22 +417,11 @@ static struct be_mcc_compl *be_mcc_compl_get(struct beiscsi_hba *phba)
 }
 
 /**
- * be2iscsi_fail_session(): Closing session with appropriate error
+ * beiscsi_fail_session(): Closing session with appropriate error
  * @cls_session: ptr to session
- *
- * Depending on adapter state appropriate error flag is passed.
  **/
-void be2iscsi_fail_session(struct iscsi_cls_session *cls_session)
+void beiscsi_fail_session(struct iscsi_cls_session *cls_session)
 {
-	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
-	struct beiscsi_hba *phba = iscsi_host_priv(shost);
-	uint32_t iscsi_err_flag;
-
-	if (phba->state & BE_ADAPTER_STATE_SHUTDOWN)
-		iscsi_err_flag = ISCSI_ERR_INVALID_HOST;
-	else
-		iscsi_err_flag = ISCSI_ERR_CONN_FAILED;
-
 	iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 }
 
@@ -450,7 +439,7 @@ void beiscsi_async_link_state_process(struct beiscsi_hba *phba,
 			    evt->physical_port);
 
 		iscsi_host_for_each_session(phba->shost,
-					    be2iscsi_fail_session);
+					    beiscsi_fail_session);
 	} else if ((evt->port_link_status & ASYNC_EVENT_LINK_UP) ||
 		    ((evt->port_link_status & ASYNC_EVENT_LOGICAL) &&
 		     (evt->port_fault == BEISCSI_PHY_LINK_FAULT_NONE))) {

drivers/scsi/be2iscsi/be_cmds.h

@@ -1367,5 +1367,5 @@ void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, int payload_len,
 void be_cmd_hdr_prepare(struct be_cmd_req_hdr *req_hdr,
 			u8 subsystem, u8 opcode, int cmd_len);
 
-void be2iscsi_fail_session(struct iscsi_cls_session *cls_session);
+void beiscsi_fail_session(struct iscsi_cls_session *cls_session);
 #endif /* !BEISCSI_CMDS_H */

drivers/scsi/be2iscsi/be_main.c

@@ -5313,7 +5313,6 @@ static void beiscsi_quiesce(struct beiscsi_hba *phba,
 
 static void beiscsi_remove(struct pci_dev *pcidev)
 {
-
 	struct beiscsi_hba *phba = NULL;
 
 	phba = pci_get_drvdata(pcidev);
@@ -5323,9 +5322,9 @@ static void beiscsi_remove(struct pci_dev *pcidev)
 	}
 
 	beiscsi_destroy_def_ifaces(phba);
-	beiscsi_quiesce(phba, BEISCSI_CLEAN_UNLOAD);
 	iscsi_boot_destroy_kset(phba->boot_kset);
 	iscsi_host_remove(phba->shost);
+	beiscsi_quiesce(phba, BEISCSI_CLEAN_UNLOAD);
 	pci_dev_put(phba->pcidev);
 	iscsi_host_free(phba->shost);
 	pci_disable_pcie_error_reporting(pcidev);
@@ -5334,23 +5333,6 @@ static void beiscsi_remove(struct pci_dev *pcidev)
 	pci_disable_device(pcidev);
 }
 
-static void beiscsi_shutdown(struct pci_dev *pcidev)
-{
-
-	struct beiscsi_hba *phba = NULL;
-
-	phba = (struct beiscsi_hba *)pci_get_drvdata(pcidev);
-	if (!phba) {
-		dev_err(&pcidev->dev, "beiscsi_shutdown called with no phba\n");
-		return;
-	}
-
-	phba->state = BE_ADAPTER_STATE_SHUTDOWN;
-	iscsi_host_for_each_session(phba->shost, be2iscsi_fail_session);
-	beiscsi_quiesce(phba, BEISCSI_CLEAN_UNLOAD);
-	pci_disable_device(pcidev);
-}
-
 static void beiscsi_msix_enable(struct beiscsi_hba *phba)
 {
 	int i, status;
@@ -5670,6 +5652,9 @@ static int beiscsi_dev_probe(struct pci_dev *pcidev,
 		goto hba_free;
 	}
 
+	/*
+	 * FUNCTION_RESET should clean up any stale info in FW for this fn
+	 */
 	ret = beiscsi_cmd_reset_function(phba);
 	if (ret) {
 		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
@@ -5857,7 +5842,6 @@ static struct pci_driver beiscsi_pci_driver = {
 	.name = DRV_NAME,
 	.probe = beiscsi_dev_probe,
 	.remove = beiscsi_remove,
-	.shutdown = beiscsi_shutdown,
 	.id_table = beiscsi_pci_id_table,
 	.err_handler = &beiscsi_eeh_handlers
 };

drivers/scsi/be2iscsi/be_main.h

@@ -103,8 +103,7 @@
 #define BE_ADAPTER_LINK_UP	0x001
 #define BE_ADAPTER_LINK_DOWN	0x002
 #define BE_ADAPTER_PCI_ERR	0x004
-#define BE_ADAPTER_STATE_SHUTDOWN	0x008
-#define BE_ADAPTER_CHECK_BOOT	0x010
+#define BE_ADAPTER_CHECK_BOOT	0x008
 
 
 #define BEISCSI_CLEAN_UNLOAD	0x01