--- zzzz-none-000/linux-5.4.213/drivers/usb/host/xhci.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/drivers/usb/host/xhci.c	2024-08-14 09:02:08.000000000 +0000
@@ -24,6 +24,13 @@
 #include "xhci-debugfs.h"
 #include "xhci-dbgcap.h"
 
+#if defined(CONFIG_AVM_ENHANCED)
+/* 20239421 AVM/WKR USB3 ports switchable */
+int usb3port_config; //default USB2 only
+module_param(usb3port_config, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(usb3port_config, "Bitmask of allowed USB3 ports");
+#endif
+
 #define DRIVER_AUTHOR "Sarah Sharp"
 #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver"
 
@@ -5360,7 +5367,8 @@
 	 * generic hardware linkage
 	 */
 	.irq =			xhci_irq,
-	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB3 | HCD_SHARED,
+	.flags =		HCD_MEMORY | HCD_DMA | HCD_USB3 | HCD_SHARED |
+				HCD_BH,
 
 	/*
 	 * basic lifecycle operations