diff --git a/ironic/drivers/modules/redfish/management.py b/ironic/drivers/modules/redfish/management.py
index 2762394333..c4ebd953cf 100644
--- a/ironic/drivers/modules/redfish/management.py
+++ b/ironic/drivers/modules/redfish/management.py
@@ -742,6 +742,8 @@ class RedfishManagement(base.ManagementInterface):
             skip_current_step=True,
             polling=True)
 
+        deploy_opts = deploy_utils.build_agent_options(task.node)
+        task.driver.boot.prepare_ramdisk(task, deploy_opts)
         manager_utils.node_power_action(task, states.REBOOT)
 
         return deploy_utils.get_async_step_return_state(task.node)
@@ -999,7 +1001,7 @@ class RedfishManagement(base.ManagementInterface):
             # Only parse the messages if the BMC did not return parsed
             # messages
             messages = []
-            if not sushy_task.messages[0].message:
+            if sushy_task.messages and not sushy_task.messages[0].message:
                 sushy_task.parse_messages()
 
             messages = [m.message for m in sushy_task.messages]
diff --git a/ironic/tests/unit/drivers/modules/redfish/test_management.py b/ironic/tests/unit/drivers/modules/redfish/test_management.py
index 98f3b75f77..f9e74d964c 100644
--- a/ironic/tests/unit/drivers/modules/redfish/test_management.py
+++ b/ironic/tests/unit/drivers/modules/redfish/test_management.py
@@ -27,6 +27,7 @@ from ironic.common import states
 from ironic.conductor import task_manager
 from ironic.conductor import utils as manager_utils
 from ironic.drivers.modules import deploy_utils
+from ironic.drivers.modules.redfish import boot as redfish_boot
 from ironic.drivers.modules.redfish import management as redfish_mgmt
 from ironic.drivers.modules.redfish import utils as redfish_utils
 from ironic.tests.unit.db import base as db_base
@@ -740,6 +741,10 @@ class RedfishManagementTestCase(db_base.DbTestCase):
             response = task.driver.management.detect_vendor(task)
             self.assertEqual("Fake GmbH", response)
 
+    @mock.patch.object(deploy_utils, 'build_agent_options',
+                       spec_set=True, autospec=True)
+    @mock.patch.object(redfish_boot.RedfishVirtualMediaBoot, 'prepare_ramdisk',
+                       spec_set=True, autospec=True)
     @mock.patch.object(manager_utils, 'node_power_action', autospec=True)
     @mock.patch.object(deploy_utils, 'get_async_step_return_state',
                        autospec=True)
@@ -748,7 +753,9 @@ class RedfishManagementTestCase(db_base.DbTestCase):
     def test_update_firmware(self, mock_get_update_service,
                              mock_set_async_step_flags,
                              mock_get_async_step_return_state,
-                             mock_node_power_action):
+                             mock_node_power_action, mock_prepare,
+                             build_mock):
+        build_mock.return_value = {'a': 'b'}
         mock_task_monitor = mock.Mock()
         mock_task_monitor.task_monitor = '/task/123'
         mock_update_service = mock.Mock()
@@ -1142,6 +1149,7 @@ class RedfishManagementTestCase(db_base.DbTestCase):
         mock_message = mock.Mock()
         mock_message.message = 'Firmware upgrade failed'
         messages = mock.PropertyMock(side_effect=[[mock_message_unparsed],
+                                                  [mock_message],
                                                   [mock_message]])
         type(mock_sushy_task).messages = messages
         mock_task_monitor = mock.Mock()
diff --git a/releasenotes/notes/fixes-ilo5-redfish-firmware-update-issue-c6dfcd71a2f659a5.yaml b/releasenotes/notes/fixes-ilo5-redfish-firmware-update-issue-c6dfcd71a2f659a5.yaml
new file mode 100644
index 0000000000..bb114c2bc2
--- /dev/null
+++ b/releasenotes/notes/fixes-ilo5-redfish-firmware-update-issue-c6dfcd71a2f659a5.yaml
@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    Fixes redfish firmware update for ilo5 based hardware by
+    making necessary changes to check whether sushy_task.messages
+    is present, since in case of iLo task data does not contain
+    messages attribute. Also it was not calling prepare_ramdisk()
+    before rebooting the system to update the firmware which has
+    been fixed in this patch.