[SCSI] iscsi_boot_sysfs: have this module check for null on destruction

This moves the check for NULL boot_sets to the iscsi_boot_sysfs
module instead of having the drivers do it.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/be2iscsi/be_main.c

@@ -420,8 +420,7 @@ static int beiscsi_setup_boot_info(struct beiscsi_hba *phba)
 	return 0;
 
 free_kset:
-	if (phba->boot_kset)
-		iscsi_boot_destroy_kset(phba->boot_kset);
+	iscsi_boot_destroy_kset(phba->boot_kset);
 	return -ENOMEM;
 }
 
@@ -4149,8 +4148,7 @@ static void beiscsi_remove(struct pci_dev *pcidev)
 			    phba->ctrl.mbox_mem_alloced.size,
 			    phba->ctrl.mbox_mem_alloced.va,
 			    phba->ctrl.mbox_mem_alloced.dma);
-	if (phba->boot_kset)
-		iscsi_boot_destroy_kset(phba->boot_kset);
+	iscsi_boot_destroy_kset(phba->boot_kset);
 	iscsi_host_remove(phba->shost);
 	pci_dev_put(phba->pcidev);
 	iscsi_host_free(phba->shost);

drivers/scsi/iscsi_boot_sysfs.c

@@ -472,6 +472,9 @@ void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset)
 {
 	struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
 
+	if (!boot_kset)
+		return;
+
 	list_for_each_entry_safe(boot_kobj, tmp_kobj,
 				 &boot_kset->kobj_list, list)
 		iscsi_boot_remove_kobj(boot_kobj);