staging: unisys: Remove unneeded fields in diagchannel.h

Diagchannel.h is used primarily for the diagnostics channel. The
diagnostics channel is not being used by linux guests currently, so
the majority of the file is not needed. What is left is what is
needed to perform postcode vmcalls. Those postcodes will eventually
end up in the diag channel.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -110,17 +110,8 @@ static DEFINE_SEMAPHORE(notifier_lock);
 static struct cdev file_cdev;
 static struct visorchannel **file_controlvm_channel;
 static struct controlvm_message_header g_chipset_msg_hdr;
-static const uuid_le spar_diag_pool_channel_protocol_uuid =
-	SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID;
-/* 0xffffff is an invalid Bus/Device number */
-static u32 g_diagpool_bus_no = 0xffffff;
-static u32 g_diagpool_dev_no = 0xffffff;
 static struct controlvm_message_packet g_devicechangestate_packet;
 
-#define is_diagpool_channel(channel_type_guid) \
-	(uuid_le_cmp(channel_type_guid,\
-		     spar_diag_pool_channel_protocol_uuid) == 0)
-
 static LIST_HEAD(bus_info_list);
 static LIST_HEAD(dev_info_list);
 
@@ -827,14 +818,6 @@ controlvm_respond(struct controlvm_message_header *msg_hdr, int response)
 	struct controlvm_message outmsg;
 
 	controlvm_init_response(&outmsg, msg_hdr, response);
-	/* For DiagPool channel DEVICE_CHANGESTATE, we need to send
-	* back the deviceChangeState structure in the packet. */
-	if (msg_hdr->id == CONTROLVM_DEVICE_CHANGESTATE &&
-	    g_devicechangestate_packet.device_change_state.bus_no ==
-	    g_diagpool_bus_no &&
-	    g_devicechangestate_packet.device_change_state.dev_no ==
-	    g_diagpool_dev_no)
-		outmsg.cmd = g_devicechangestate_packet;
 	if (outmsg.hdr.flags.test_message == 1)
 		return;
 
@@ -1008,15 +991,8 @@ device_epilog(struct visor_device *dev_info,
 {
 	struct visorchipset_busdev_notifiers *notifiers;
 	bool notified = false;
-	u32 bus_no = dev_info->chipset_bus_no;
-	u32 dev_no = dev_info->chipset_dev_no;
 	struct controlvm_message_header *pmsg_hdr = NULL;
 
-	char *envp[] = {
-		"SPARSP_DIAGPOOL_PAUSED_STATE = 1",
-		NULL
-	};
-
 	notifiers = &busdev_notifiers;
 
 	if (!dev_info) {
@@ -1075,21 +1051,6 @@ device_epilog(struct visor_device *dev_info,
 					(*notifiers->device_pause) (dev_info);
 					notified = true;
 				}
-			} else if (state.alive == segment_state_paused.alive &&
-				   state.operating ==
-				   segment_state_paused.operating) {
-				/* this is lite pause where channel is
-				 * still valid just 'pause' of it
-				 */
-				if (bus_no == g_diagpool_bus_no &&
-				    dev_no == g_diagpool_dev_no) {
-					/* this will trigger the
-					 * diag_shutdown.sh script in
-					 * the visorchipset hotplug */
-					kobject_uevent_env
-					    (&visorchipset_platform_device.dev.
-					     kobj, KOBJ_ONLINE, envp);
-				}
 			}
 			break;
 		case CONTROLVM_DEVICE_DESTROY:
@@ -1298,12 +1259,6 @@ my_device_create(struct controlvm_message *inmsg)
 	POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no,
 			 POSTCODE_SEVERITY_INFO);
 cleanup:
-	/* get the bus and devNo for DiagPool channel */
-	if (dev_info &&
-	    is_diagpool_channel(cmd->create_device.data_type_uuid)) {
-		g_diagpool_bus_no = bus_no;
-		g_diagpool_dev_no = dev_no;
-	}
 	device_epilog(dev_info, segment_state_running,
 		      CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc,
 		      inmsg->hdr.flags.response_expected == 1, 1);