staging: unisys: visorbus: bus_destroy do not call bus_epilog

Have bus_destroy call chipset_bus_destroy directly instead of going
through bus_epilog.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -902,18 +902,47 @@ static void
 bus_destroy(struct controlvm_message *inmsg)
 {
 	struct controlvm_message_packet *cmd = &inmsg->cmd;
+	struct controlvm_message_header *pmsg_hdr = NULL;
 	u32 bus_no = cmd->destroy_bus.bus_no;
 	struct visor_device *bus_info;
 	int rc = CONTROLVM_RESP_SUCCESS;
 
 	bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL);
-	if (!bus_info)
+	if (!bus_info) {
 		rc = -CONTROLVM_RESP_ERROR_BUS_INVALID;
-	else if (bus_info->state.created == 0)
+		goto out_respond;
+	}
+	if (bus_info->state.created == 0) {
 		rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
+		goto out_respond;
+	}
+	if (bus_info->pending_msg_hdr) {
+		/* only non-NULL if dev is still waiting on a response */
+		rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT;
+		goto out_respond;
+	}
+	if (inmsg->hdr.flags.response_expected == 1) {
+		pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
+		if (!pmsg_hdr) {
+			POSTCODE_LINUX_4(MALLOC_FAILURE_PC, cmd,
+					 bus_info->chipset_bus_no,
+					 POSTCODE_SEVERITY_ERR);
+			rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
+			goto out_respond;
+		}
 
-	bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr,
-		   rc, inmsg->hdr.flags.response_expected == 1);
+		memcpy(pmsg_hdr, &inmsg->hdr,
+		       sizeof(struct controlvm_message_header));
+		bus_info->pending_msg_hdr = pmsg_hdr;
+	}
+
+	/* Response will be handled by chipset_bus_destroy */
+	chipset_bus_destroy(bus_info);
+	return;
+
+out_respond:
+	if (inmsg->hdr.flags.response_expected == 1)
+		bus_responder(inmsg->hdr.id, &inmsg->hdr, rc);
 
 	/* bus_info is freed as part of the busdevice_release function */
 }