--- zzzz-none-000/linux-4.9.279/drivers/usb/host/xhci-mem.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/usb/host/xhci-mem.c	2023-02-08 11:43:42.000000000 +0000
@@ -2238,7 +2238,9 @@
 		xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 				"xHCI 1.0: support USB2 software lpm");
 		xhci->sw_lpm_support = 1;
-		if (temp & XHCI_HLC) {
+
+		/*= 20180820 AVM/WKR : Do not allow LPM =*/
+		if (!IS_ENABLED(CONFIG_AVM_KERNEL) && (temp & XHCI_HLC)) {
 			xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 					"xHCI 1.0: support USB2 hardware lpm");
 			xhci->hw_lpm_support = 1;