diff --git a/examples/host/bare_api/only.txt b/examples/host/bare_api/only.txt
index 3837ac8a2..fee10f9e2 100644
--- a/examples/host/bare_api/only.txt
+++ b/examples/host/bare_api/only.txt
@@ -1,3 +1,4 @@
+mcu:KINETIS_KL
 mcu:LPC175X_6X
 mcu:LPC177X_8X
 mcu:LPC18XX
diff --git a/examples/host/cdc_msc_hid/only.txt b/examples/host/cdc_msc_hid/only.txt
index 3837ac8a2..fee10f9e2 100644
--- a/examples/host/cdc_msc_hid/only.txt
+++ b/examples/host/cdc_msc_hid/only.txt
@@ -1,3 +1,4 @@
+mcu:KINETIS_KL
 mcu:LPC175X_6X
 mcu:LPC177X_8X
 mcu:LPC18XX
diff --git a/examples/host/hid_controller/only.txt b/examples/host/hid_controller/only.txt
index 3837ac8a2..fee10f9e2 100644
--- a/examples/host/hid_controller/only.txt
+++ b/examples/host/hid_controller/only.txt
@@ -1,3 +1,4 @@
+mcu:KINETIS_KL
 mcu:LPC175X_6X
 mcu:LPC177X_8X
 mcu:LPC18XX
diff --git a/examples/host/msc_file_explorer/only.txt b/examples/host/msc_file_explorer/only.txt
index 3837ac8a2..fee10f9e2 100644
--- a/examples/host/msc_file_explorer/only.txt
+++ b/examples/host/msc_file_explorer/only.txt
@@ -1,3 +1,4 @@
+mcu:KINETIS_KL
 mcu:LPC175X_6X
 mcu:LPC177X_8X
 mcu:LPC18XX
diff --git a/hw/bsp/imxrt/family.c b/hw/bsp/imxrt/family.c
index ec95a8b24..32d89f794 100644
--- a/hw/bsp/imxrt/family.c
+++ b/hw/bsp/imxrt/family.c
@@ -188,7 +188,7 @@ void USB_OTG1_IRQHandler(void)
   #endif
 
   #if PORT_SUPPORT_HOST(0)
-    tuh_int_handler(0);
+    tuh_int_handler(0, true);
   #endif
 }
 
@@ -199,7 +199,7 @@ void USB_OTG2_IRQHandler(void)
   #endif
 
   #if PORT_SUPPORT_HOST(1)
-    tuh_int_handler(1);
+    tuh_int_handler(1, true);
   #endif
 }
 
diff --git a/hw/bsp/kinetis_kl/family.c b/hw/bsp/kinetis_kl/family.c
index 3e9aa83a4..c436be3e6 100644
--- a/hw/bsp/kinetis_kl/family.c
+++ b/hw/bsp/kinetis_kl/family.c
@@ -39,7 +39,7 @@
 void USB0_IRQHandler(void)
 {
 #if CFG_TUH_ENABLED
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
 #endif
 #if CFG_TUD_ENABLED
   tud_int_handler(0);
diff --git a/hw/bsp/kinetis_kl/family.cmake b/hw/bsp/kinetis_kl/family.cmake
index 793ef1783..4151979a0 100644
--- a/hw/bsp/kinetis_kl/family.cmake
+++ b/hw/bsp/kinetis_kl/family.cmake
@@ -22,48 +22,47 @@ set(FAMILY_MCUS KINETIS_KL CACHE INTERNAL "")
 #------------------------------------
 # only need to be built ONCE for all examples
 function(add_board_target BOARD_TARGET)
-  if (NOT TARGET ${BOARD_TARGET})
-    add_library(${BOARD_TARGET} STATIC
-      ${SDK_DIR}/drivers/gpio/fsl_gpio.c
-      ${SDK_DIR}/drivers/lpsci/fsl_lpsci.c
-      ${SDK_DIR}/drivers/uart/fsl_uart.c
-      ${SDK_DIR}/devices/${MCU_VARIANT}/drivers/fsl_clock.c
-      ${SDK_DIR}/devices/${MCU_VARIANT}/system_${MCU_VARIANT}.c
-      )
-    target_compile_definitions(${BOARD_TARGET} PUBLIC
-      )
-    target_include_directories(${BOARD_TARGET} PUBLIC
-      ${CMSIS_DIR}/CMSIS/Core/Include
-      ${SDK_DIR}/devices/${MCU_VARIANT}
-      ${SDK_DIR}/devices/${MCU_VARIANT}/drivers
-      ${SDK_DIR}/drivers/common
-      ${SDK_DIR}/drivers/gpio
-      ${SDK_DIR}/drivers/lpsci
-      ${SDK_DIR}/drivers/port
-      ${SDK_DIR}/drivers/smc
-      ${SDK_DIR}/drivers/uart
-      )
+  if (TARGET ${BOARD_TARGET})
+    return()
+  endif ()
 
-    update_board(${BOARD_TARGET})
+  add_library(${BOARD_TARGET} STATIC
+    ${SDK_DIR}/drivers/gpio/fsl_gpio.c
+    ${SDK_DIR}/drivers/lpsci/fsl_lpsci.c
+    ${SDK_DIR}/drivers/uart/fsl_uart.c
+    ${SDK_DIR}/devices/${MCU_VARIANT}/drivers/fsl_clock.c
+    ${SDK_DIR}/devices/${MCU_VARIANT}/system_${MCU_VARIANT}.c
+    )
+  target_compile_definitions(${BOARD_TARGET} PUBLIC
+    )
+  target_include_directories(${BOARD_TARGET} PUBLIC
+    ${CMSIS_DIR}/CMSIS/Core/Include
+    ${SDK_DIR}/devices/${MCU_VARIANT}
+    ${SDK_DIR}/devices/${MCU_VARIANT}/drivers
+    ${SDK_DIR}/drivers/common
+    ${SDK_DIR}/drivers/gpio
+    ${SDK_DIR}/drivers/lpsci
+    ${SDK_DIR}/drivers/port
+    ${SDK_DIR}/drivers/smc
+    ${SDK_DIR}/drivers/uart
+    )
+  update_board(${BOARD_TARGET})
 
-    # LD_FILE and STARTUP_FILE can be defined in board.cmake
+  # LD_FILE and STARTUP_FILE can be defined in board.cmake
+  target_sources(${BOARD_TARGET} PUBLIC
+    ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
+    )
 
-    target_sources(${BOARD_TARGET} PUBLIC
-      ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
+  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--script=${LD_FILE_GNU}"
+      # nanolib
+      --specs=nosys.specs --specs=nano.specs
+      )
+  elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--config=${LD_FILE_IAR}"
       )
-
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-      target_link_options(${BOARD_TARGET} PUBLIC
-        "LINKER:--script=${LD_FILE_GNU}"
-        # nanolib
-        --specs=nosys.specs
-        --specs=nano.specs
-        )
-    elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
-      target_link_options(${BOARD_TARGET} PUBLIC
-        "LINKER:--config=${LD_FILE_IAR}"
-        )
-    endif ()
   endif ()
 endfunction()
 
diff --git a/hw/bsp/lpc17/boards/lpcxpresso1769/lpcxpresso1769.c b/hw/bsp/lpc17/boards/lpcxpresso1769/lpcxpresso1769.c
index c7d655368..8c26b906f 100644
--- a/hw/bsp/lpc17/boards/lpcxpresso1769/lpcxpresso1769.c
+++ b/hw/bsp/lpc17/boards/lpcxpresso1769/lpcxpresso1769.c
@@ -37,7 +37,7 @@ void USB_IRQHandler(void)
   #endif
 
   #if CFG_TUH_ENABLED
-    tuh_int_handler(0);
+    tuh_int_handler(0, true);
   #endif
 }
 
diff --git a/hw/bsp/lpc17/boards/mbed1768/mbed1768.c b/hw/bsp/lpc17/boards/mbed1768/mbed1768.c
index b2c92d640..613dcb570 100644
--- a/hw/bsp/lpc17/boards/mbed1768/mbed1768.c
+++ b/hw/bsp/lpc17/boards/mbed1768/mbed1768.c
@@ -151,7 +151,7 @@ void USB_IRQHandler(void)
   #endif
 
   #if CFG_TUH_ENABLED
-    tuh_int_handler(0);
+    tuh_int_handler(0, true);
   #endif
 }
 
diff --git a/hw/bsp/lpc18/family.c b/hw/bsp/lpc18/family.c
index b11f4fe0e..e6abecb4b 100644
--- a/hw/bsp/lpc18/family.c
+++ b/hw/bsp/lpc18/family.c
@@ -43,25 +43,23 @@
 //--------------------------------------------------------------------+
 // USB Interrupt Handler
 //--------------------------------------------------------------------+
-void USB0_IRQHandler(void)
-{
+void USB0_IRQHandler(void) {
   #if PORT_SUPPORT_DEVICE(0)
-    tud_int_handler(0);
+  tud_int_handler(0);
   #endif
 
   #if PORT_SUPPORT_HOST(0)
-    tuh_int_handler(0);
+  tuh_int_handler(0, true);
   #endif
 }
 
-void USB1_IRQHandler(void)
-{
+void USB1_IRQHandler(void) {
   #if PORT_SUPPORT_DEVICE(1)
-    tud_int_handler(1);
+  tud_int_handler(1);
   #endif
 
   #if PORT_SUPPORT_HOST(1)
-    tuh_int_handler(1);
+  tuh_int_handler(1, true);
   #endif
 }
 
@@ -74,28 +72,26 @@ const uint32_t OscRateIn = 12000000;
 const uint32_t ExtRateIn = 0;
 
 // Invoked by startup code
-void SystemInit(void)
-{
+void SystemInit(void) {
 #ifdef __USE_LPCOPEN
-	extern void (* const g_pfnVectors[])(void);
+  extern void (*const g_pfnVectors[])(void);
   unsigned int *pSCB_VTOR = (unsigned int *) 0xE000ED08;
-	*pSCB_VTOR = (unsigned int) g_pfnVectors;
+  *pSCB_VTOR = (unsigned int) g_pfnVectors;
 #endif
 
   board_lpc18_pinmux();
 
-  #ifdef TRACE_ETM
+#ifdef TRACE_ETM
   // Trace clock is limited to 60MHz, limit CPU clock to 120MHz
   Chip_SetupCoreClock(CLKIN_CRYSTAL, 120000000UL, true);
-  #else
+#else
   // CPU clock max to 180 Mhz
   Chip_SetupCoreClock(CLKIN_CRYSTAL, MAX_CLOCK_FREQ, true);
-  #endif
+#endif
 
 }
 
-void board_init(void)
-{
+void board_init(void) {
   SystemCoreClockUpdate();
 
 #if CFG_TUSB_OS == OPT_OS_NONE
@@ -135,27 +131,22 @@ void board_init(void)
 // Board porting API
 //--------------------------------------------------------------------+
 
-void board_led_write(bool state)
-{
+void board_led_write(bool state) {
   Chip_GPIO_SetPinState(LPC_GPIO_PORT, LED_PORT, LED_PIN, state);
 }
 
-uint32_t board_button_read(void)
-{
+uint32_t board_button_read(void) {
   // active low
   return Chip_GPIO_GetPinState(LPC_GPIO_PORT, BUTTON_PORT, BUTTON_PIN) ? 0 : 1;
 }
 
-int board_uart_read(uint8_t* buf, int len)
-{
+int board_uart_read(uint8_t *buf, int len) {
   return Chip_UART_Read(UART_DEV, buf, len);
 }
 
-int board_uart_write(void const * buf, int len)
-{
-  uint8_t const* buf8 = (uint8_t const*) buf;
-  for(int i=0; i<len; i++)
-  {
+int board_uart_write(void const *buf, int len) {
+  uint8_t const *buf8 = (uint8_t const *) buf;
+  for (int i = 0; i < len; i++) {
     while ((Chip_UART_ReadLineStatus(UART_DEV) & UART_LSR_THRE) == 0) {}
     Chip_UART_SendByte(UART_DEV, buf8[i]);
   }
@@ -165,13 +156,13 @@ int board_uart_write(void const * buf, int len)
 
 #if CFG_TUSB_OS == OPT_OS_NONE
 volatile uint32_t system_ticks = 0;
-void SysTick_Handler (void)
-{
+
+void SysTick_Handler(void) {
   system_ticks++;
 }
 
-uint32_t board_millis(void)
-{
+uint32_t board_millis(void) {
   return system_ticks;
 }
+
 #endif
diff --git a/hw/bsp/lpc40/family.c b/hw/bsp/lpc40/family.c
index 526e3a080..d6c8ef32a 100644
--- a/hw/bsp/lpc40/family.c
+++ b/hw/bsp/lpc40/family.c
@@ -37,7 +37,7 @@ void USB_IRQHandler(void) {
   #endif
 
   #if CFG_TUH_ENABLED
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
   #endif
 }
 
diff --git a/hw/bsp/lpc43/family.c b/hw/bsp/lpc43/family.c
index d52c1a071..8be729f7d 100644
--- a/hw/bsp/lpc43/family.c
+++ b/hw/bsp/lpc43/family.c
@@ -213,7 +213,7 @@ void USB0_IRQHandler(void)
   #endif
 
   #if PORT_SUPPORT_HOST(0)
-    tuh_int_handler(0);
+    tuh_int_handler(0, true);
   #endif
 }
 
@@ -224,7 +224,7 @@ void USB1_IRQHandler(void)
   #endif
 
   #if PORT_SUPPORT_HOST(1)
-    tuh_int_handler(1);
+    tuh_int_handler(1, true);
   #endif
 }
 
diff --git a/hw/bsp/msp432e4/family.c b/hw/bsp/msp432e4/family.c
index 10f3ac736..d5ef7f930 100644
--- a/hw/bsp/msp432e4/family.c
+++ b/hw/bsp/msp432e4/family.c
@@ -34,7 +34,7 @@
 void USB0_IRQHandler(void)
 {
 #if CFG_TUH_ENABLED
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
 #endif
 #if CFG_TUD_ENABLED
   tud_int_handler(0);
diff --git a/hw/bsp/ngx4330/ngx4330.c b/hw/bsp/ngx4330/ngx4330.c
index a767d5f29..bd84e449b 100644
--- a/hw/bsp/ngx4330/ngx4330.c
+++ b/hw/bsp/ngx4330/ngx4330.c
@@ -214,7 +214,7 @@ void USB0_IRQHandler(void)
   #endif
 
   #if PORT_SUPPORT_HOST(0)
-    tuh_int_handler(0);
+    tuh_int_handler(0, true);
   #endif
 }
 
@@ -225,7 +225,7 @@ void USB1_IRQHandler(void)
   #endif
 
   #if PORT_SUPPORT_HOST(1)
-    tuh_int_handler(1);
+    tuh_int_handler(1, true);
   #endif
 }
 
diff --git a/hw/bsp/nrf/family.c b/hw/bsp/nrf/family.c
index 6fcfd9476..fc755f512 100644
--- a/hw/bsp/nrf/family.c
+++ b/hw/bsp/nrf/family.c
@@ -100,7 +100,7 @@ static nrfx_spim_t _spi = NRFX_SPIM_INSTANCE(1);
 void max3421_int_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
   if (!(pin == MAX3421_INTR_PIN && action == NRF_GPIOTE_POLARITY_HITOLO)) return;
 
-  tuh_int_handler(1);
+  tuh_int_handler(1, true);
 }
 #endif
 
diff --git a/hw/bsp/ra/family.c b/hw/bsp/ra/family.c
index 0aa58d86d..fdf4c8666 100644
--- a/hw/bsp/ra/family.c
+++ b/hw/bsp/ra/family.c
@@ -188,7 +188,7 @@ void usbfs_interrupt_handler(void) {
   R_BSP_IrqStatusClear(irq);
 
   #if PORT_SUPPORT_HOST(0)
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
   #endif
 
   #if PORT_SUPPORT_DEVICE(0)
@@ -201,7 +201,7 @@ void usbfs_resume_handler(void) {
   R_BSP_IrqStatusClear(irq);
 
   #if PORT_SUPPORT_HOST(0)
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
   #endif
 
   #if PORT_SUPPORT_DEVICE(0)
@@ -229,7 +229,7 @@ void usbhs_interrupt_handler(void) {
   R_BSP_IrqStatusClear(irq);
 
   #if PORT_SUPPORT_HOST(1)
-  tuh_int_handler(1);
+  tuh_int_handler(1, true);
   #endif
 
   #if PORT_SUPPORT_DEVICE(1)
diff --git a/hw/bsp/rx/boards/rx65n_target/rx65n_target.c b/hw/bsp/rx/boards/rx65n_target/rx65n_target.c
index 513eca678..032dac810 100644
--- a/hw/bsp/rx/boards/rx65n_target/rx65n_target.c
+++ b/hw/bsp/rx/boards/rx65n_target/rx65n_target.c
@@ -177,7 +177,7 @@ void INT_Excep_SCI5_RXI5(void)
 void INT_Excep_USB0_USBI0(void)
 {
 #if CFG_TUH_ENABLED
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
 #endif
 #if CFG_TUD_ENABLED
   tud_int_handler(0);
diff --git a/hw/bsp/samd21/family.c b/hw/bsp/samd21/family.c
index cfe66b8dc..0ea729055 100644
--- a/hw/bsp/samd21/family.c
+++ b/hw/bsp/samd21/family.c
@@ -356,7 +356,7 @@ void EIC_Handler(void) {
   EIC->INTFLAG.reg = EIC_INTFLAG_EXTINT(1 << MAX3421_INTR_EIC_ID);
 
   // Call the TinyUSB interrupt handler
-  tuh_int_handler(1);
+  tuh_int_handler(1, true);
 }
 
 void tuh_max3421_int_api(uint8_t rhport, bool enabled) {
diff --git a/hw/bsp/samd51/family.c b/hw/bsp/samd51/family.c
index 2cf00c7af..268d60e48 100644
--- a/hw/bsp/samd51/family.c
+++ b/hw/bsp/samd51/family.c
@@ -296,7 +296,7 @@ void MAX3421_EIC_Handler(void) {
   EIC->INTFLAG.reg = EIC_INTFLAG_EXTINT(1 << MAX3421_INTR_EIC_ID);
 
   // Call the TinyUSB interrupt handler
-  tuh_int_handler(1);
+  tuh_int_handler(1, true);
 }
 
 void tuh_max3421_int_api(uint8_t rhport, bool enabled) {
diff --git a/hw/bsp/stm32g4/family.cmake b/hw/bsp/stm32g4/family.cmake
index 675a96c74..f8cabcbe5 100644
--- a/hw/bsp/stm32g4/family.cmake
+++ b/hw/bsp/stm32g4/family.cmake
@@ -26,50 +26,47 @@ set(FAMILY_MCUS STM32G4 CACHE INTERNAL "")
 #------------------------------------
 # only need to be built ONCE for all examples
 function(add_board_target BOARD_TARGET)
-  if (NOT TARGET ${BOARD_TARGET})
-    # Startup & Linker script
-    set(STARTUP_FILE_GNU ${ST_CMSIS}/Source/Templates/gcc/startup_${MCU_VARIANT}.s)
-    set(STARTUP_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/startup_${MCU_VARIANT}.s)
-    set(LD_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/linker/${MCU_VARIANT}_flash.icf)
+  if (TARGET ${BOARD_TARGET})
+    return()
+  endif ()
 
-    add_library(${BOARD_TARGET} STATIC
-      ${ST_CMSIS}/Source/Templates/system_${ST_PREFIX}.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_cortex.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_pwr_ex.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc_ex.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_gpio.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart.c
-      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart_ex.c
-      ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
-      )
-    target_include_directories(${BOARD_TARGET} PUBLIC
-      ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
-      ${CMSIS_5}/CMSIS/Core/Include
-      ${ST_CMSIS}/Include
-      ${ST_HAL_DRIVER}/Inc
-      )
-    target_compile_options(${BOARD_TARGET} PUBLIC
-      )
-    target_compile_definitions(${BOARD_TARGET} PUBLIC
-      )
+  # Startup & Linker script
+  set(STARTUP_FILE_GNU ${ST_CMSIS}/Source/Templates/gcc/startup_${MCU_VARIANT}.s)
+  set(STARTUP_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/startup_${MCU_VARIANT}.s)
+  set(LD_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/linker/${MCU_VARIANT}_flash.icf)
 
-    update_board(${BOARD_TARGET})
+  add_library(${BOARD_TARGET} STATIC
+    ${ST_CMSIS}/Source/Templates/system_${ST_PREFIX}.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_cortex.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_pwr_ex.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc_ex.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_gpio.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart.c
+    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart_ex.c
+    ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
+    )
+  target_include_directories(${BOARD_TARGET} PUBLIC
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
+    ${CMSIS_5}/CMSIS/Core/Include
+    ${ST_CMSIS}/Include
+    ${ST_HAL_DRIVER}/Inc
+    )
+  update_board(${BOARD_TARGET})
 
-    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
-      target_link_options(${BOARD_TARGET} PUBLIC
-        "LINKER:--script=${LD_FILE_GNU}"
-        -nostartfiles
-        # nanolib
-        --specs=nosys.specs
-        --specs=nano.specs
-        )
-    elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
-      target_link_options(${BOARD_TARGET} PUBLIC
-        "LINKER:--config=${LD_FILE_IAR}"
-        )
-    endif ()
+  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--script=${LD_FILE_GNU}"
+      -nostartfiles
+      # nanolib
+      --specs=nosys.specs
+      --specs=nano.specs
+      )
+  elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
+    target_link_options(${BOARD_TARGET} PUBLIC
+      "LINKER:--config=${LD_FILE_IAR}"
+      )
   endif ()
 endfunction()
 
diff --git a/hw/bsp/tm4c123/family.c b/hw/bsp/tm4c123/family.c
index ad5ae505f..738bc3fa0 100644
--- a/hw/bsp/tm4c123/family.c
+++ b/hw/bsp/tm4c123/family.c
@@ -8,7 +8,7 @@
 void USB0_Handler(void)
 {
 #if CFG_TUH_ENABLED
-  tuh_int_handler(0);
+  tuh_int_handler(0, true);
 #endif
 
 #if CFG_TUD_ENABLED
diff --git a/src/common/tusb_common.h b/src/common/tusb_common.h
index 6fffed11c..caeb5f2ef 100644
--- a/src/common/tusb_common.h
+++ b/src/common/tusb_common.h
@@ -75,8 +75,6 @@
 #include "tusb_types.h"
 #include "tusb_debug.h"
 
-#include "tusb_timeout.h" // TODO remove
-
 //--------------------------------------------------------------------+
 // Optional API implemented by application if needed
 // TODO move to a more ovious place/file
diff --git a/src/common/tusb_timeout.h b/src/common/tusb_timeout.h
deleted file mode 100644
index 533e67ab8..000000000
--- a/src/common/tusb_timeout.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2019 Ha Thach (tinyusb.org)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * This file is part of the TinyUSB stack.
- */
-
-/** \ingroup Group_Common Common Files
- *  \defgroup Group_TimeoutTimer timeout timer
- *  @{ */
-
-#ifndef _TUSB_TIMEOUT_H_
-#define _TUSB_TIMEOUT_H_
-
-#include <stdbool.h>
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct {
-  uint32_t start;
-  uint32_t interval;
-}tu_timeout_t;
-
-#if 0
-
-extern uint32_t tusb_hal_millis(void);
-
-static inline void tu_timeout_set(tu_timeout_t* tt, uint32_t msec)
-{
-  tt->interval = msec;
-  tt->start    = tusb_hal_millis();
-}
-
-static inline bool tu_timeout_expired(tu_timeout_t* tt)
-{
-  return ( tusb_hal_millis() - tt->start ) >= tt->interval;
-}
-
-// For used with periodic event to prevent drift
-static inline void tu_timeout_reset(tu_timeout_t* tt)
-{
-  tt->start += tt->interval;
-}
-
-static inline void tu_timeout_restart(tu_timeout_t* tt)
-{
-  tt->start = tusb_hal_millis();
-}
-
-#endif
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif /* _TUSB_TIMEOUT_H_ */
-
-/** @} */
diff --git a/src/common/tusb_verify.h b/src/common/tusb_verify.h
index 12355e8be..1b5f53dfc 100644
--- a/src/common/tusb_verify.h
+++ b/src/common/tusb_verify.h
@@ -56,12 +56,8 @@
  *   #define TU_VERIFY(cond)                  if(cond) return false;
  *   #define TU_VERIFY(cond,ret)              if(cond) return ret;
  *
- *   #define TU_VERIFY_HDLR(cond,handler)     if(cond) {handler; return false;}
- *   #define TU_VERIFY_HDLR(cond,ret,handler) if(cond) {handler; return ret;}
- *
  *   #define TU_ASSERT(cond)                  if(cond) {_MESS_FAILED(); TU_BREAKPOINT(), return false;}
  *   #define TU_ASSERT(cond,ret)              if(cond) {_MESS_FAILED(); TU_BREAKPOINT(), return ret;}
- *
  *------------------------------------------------------------------*/
 
 #ifdef __cplusplus
@@ -97,40 +93,23 @@
   #define TU_BREAKPOINT() do {} while (0)
 #endif
 
-/*------------------------------------------------------------------*/
-/* Macro Generator
- *------------------------------------------------------------------*/
-
 // Helper to implement optional parameter for TU_VERIFY Macro family
 #define _GET_3RD_ARG(arg1, arg2, arg3, ...)        arg3
-#define _GET_4TH_ARG(arg1, arg2, arg3, arg4, ...)  arg4
-
-/*------------- Generator for TU_VERIFY and TU_VERIFY_HDLR -------------*/
-#define TU_VERIFY_DEFINE(_cond, _handler, _ret)  do            \
-{                                                              \
-  if ( !(_cond) ) { _handler; return _ret;  }                  \
-} while(0)
 
 /*------------------------------------------------------------------*/
 /* TU_VERIFY
  * - TU_VERIFY_1ARGS : return false if failed
  * - TU_VERIFY_2ARGS : return provided value if failed
  *------------------------------------------------------------------*/
-#define TU_VERIFY_1ARGS(_cond)                         TU_VERIFY_DEFINE(_cond, , false)
-#define TU_VERIFY_2ARGS(_cond, _ret)                   TU_VERIFY_DEFINE(_cond, , _ret)
+#define TU_VERIFY_DEFINE(_cond, _ret)    \
+  do {                                   \
+    if ( !(_cond) ) { return _ret; }     \
+  } while(0)
 
-#define TU_VERIFY(...)                   _GET_3RD_ARG(__VA_ARGS__, TU_VERIFY_2ARGS, TU_VERIFY_1ARGS, UNUSED)(__VA_ARGS__)
+#define TU_VERIFY_1ARGS(_cond)         TU_VERIFY_DEFINE(_cond, false)
+#define TU_VERIFY_2ARGS(_cond, _ret)   TU_VERIFY_DEFINE(_cond, _ret)
 
-
-/*------------------------------------------------------------------*/
-/* TU_VERIFY WITH HANDLER
- * - TU_VERIFY_HDLR_2ARGS : execute handler, return false if failed
- * - TU_VERIFY_HDLR_3ARGS : execute handler, return provided error if failed
- *------------------------------------------------------------------*/
-#define TU_VERIFY_HDLR_2ARGS(_cond, _handler)           TU_VERIFY_DEFINE(_cond, _handler, false)
-#define TU_VERIFY_HDLR_3ARGS(_cond, _handler, _ret)     TU_VERIFY_DEFINE(_cond, _handler, _ret)
-
-#define TU_VERIFY_HDLR(...)              _GET_4TH_ARG(__VA_ARGS__, TU_VERIFY_HDLR_3ARGS, TU_VERIFY_HDLR_2ARGS,UNUSED)(__VA_ARGS__)
+#define TU_VERIFY(...)                 _GET_3RD_ARG(__VA_ARGS__, TU_VERIFY_2ARGS, TU_VERIFY_1ARGS, _dummy)(__VA_ARGS__)
 
 /*------------------------------------------------------------------*/
 /* ASSERT
@@ -138,19 +117,20 @@
  * - 1 arg : return false if failed
  * - 2 arg : return error if failed
  *------------------------------------------------------------------*/
-#define ASSERT_1ARGS(_cond)            TU_VERIFY_DEFINE(_cond, _MESS_FAILED(); TU_BREAKPOINT(), false)
-#define ASSERT_2ARGS(_cond, _ret)      TU_VERIFY_DEFINE(_cond, _MESS_FAILED(); TU_BREAKPOINT(), _ret)
+#define TU_ASSERT_DEFINE(_cond, _ret)                                 \
+  do {                                                                \
+    if ( !(_cond) ) { _MESS_FAILED(); TU_BREAKPOINT(); return _ret; } \
+  } while(0)
+
+#define TU_ASSERT_1ARGS(_cond)         TU_ASSERT_DEFINE(_cond, false)
+#define TU_ASSERT_2ARGS(_cond, _ret)   TU_ASSERT_DEFINE(_cond, _ret)
 
 #ifndef TU_ASSERT
-#define TU_ASSERT(...)             _GET_3RD_ARG(__VA_ARGS__, ASSERT_2ARGS, ASSERT_1ARGS,UNUSED)(__VA_ARGS__)
+#define TU_ASSERT(...)                 _GET_3RD_ARG(__VA_ARGS__, TU_ASSERT_2ARGS, TU_ASSERT_1ARGS, _dummy)(__VA_ARGS__)
 #endif
 
-/*------------------------------------------------------------------*/
-/* ASSERT HDLR
- *------------------------------------------------------------------*/
-
 #ifdef __cplusplus
  }
 #endif
 
-#endif /* TUSB_VERIFY_H_ */
+#endif
diff --git a/src/host/hcd.h b/src/host/hcd.h
index e25b20ea3..2bde289df 100644
--- a/src/host/hcd.h
+++ b/src/host/hcd.h
@@ -131,7 +131,7 @@ bool hcd_configure(uint8_t rhport, uint32_t cfg_id, const void* cfg_param) TU_AT
 bool hcd_init(uint8_t rhport);
 
 // Interrupt Handler
-void hcd_int_handler(uint8_t rhport);
+void hcd_int_handler(uint8_t rhport, bool in_isr);
 
 // Enable USB interrupt
 void hcd_int_enable (uint8_t rhport);
diff --git a/src/host/usbh.h b/src/host/usbh.h
index 684e8240e..770d70dfe 100644
--- a/src/host/usbh.h
+++ b/src/host/usbh.h
@@ -124,11 +124,16 @@ void tuh_task(void) {
 bool tuh_task_event_ready(void);
 
 #ifndef _TUSB_HCD_H_
-extern void hcd_int_handler(uint8_t rhport);
+extern void hcd_int_handler(uint8_t rhport, bool in_isr);
 #endif
 
-// Interrupt handler, name alias to HCD
-#define tuh_int_handler   hcd_int_handler
+// Interrupt handler alias to HCD with in_isr as optional parameter
+// - tuh_int_handler(rhport) --> hcd_int_handler(rhport, true)
+// - tuh_int_handler(rhport, in_isr) --> hcd_int_handler(rhport, in_isr)
+// Note: this is similar to TU_VERIFY(), _GET_3RD_ARG() is defined in tusb_verify.h
+#define _tuh_int_handler_1arg(_rhport)            hcd_int_handler(_rhport, true)
+#define _tuh_int_hanlder_2arg(_rhport, _in_isr)   hcd_int_handler(_rhport, _in_isr)
+#define tuh_int_handler(...)   _GET_3RD_ARG(__VA_ARGS__, _tuh_int_hanlder_2arg, _tuh_int_handler_1arg, _dummy)(__VA_ARGS__)
 
 // Check if roothub port is initialized and active as a host
 bool tuh_rhport_is_active(uint8_t rhport);
diff --git a/src/portable/analog/max3421/hcd_max3421.c b/src/portable/analog/max3421/hcd_max3421.c
index 238b518a0..d013d6179 100644
--- a/src/portable/analog/max3421/hcd_max3421.c
+++ b/src/portable/analog/max3421/hcd_max3421.c
@@ -863,7 +863,8 @@ void print_hirq(uint8_t hirq) {
 #endif
 
 // Interrupt Handler
-void hcd_int_handler(uint8_t rhport) {
+void hcd_int_handler(uint8_t rhport, bool in_isr) {
+  (void) in_isr;
   uint8_t hirq = reg_read(rhport, HIRQ_ADDR, true) & _hcd_data.hien;
   if (!hirq) return;
 //  print_hirq(hirq);
diff --git a/src/portable/ehci/ehci.c b/src/portable/ehci/ehci.c
index c93c33fc0..572b9826c 100644
--- a/src/portable/ehci/ehci.c
+++ b/src/portable/ehci/ehci.c
@@ -656,8 +656,8 @@ void process_period_xfer_isr(uint8_t rhport, uint32_t interval_ms)
 }
 
 //------------- Host Controller Driver's Interrupt Handler -------------//
-void hcd_int_handler(uint8_t rhport)
-{
+void hcd_int_handler(uint8_t rhport, bool in_isr) {
+  (void) in_isr;
   ehci_registers_t* regs = ehci_data.regs;
   uint32_t const int_status = regs->status;
 
diff --git a/src/portable/mentor/musb/hcd_musb.c b/src/portable/mentor/musb/hcd_musb.c
index 02090df85..5312c2812 100644
--- a/src/portable/mentor/musb/hcd_musb.c
+++ b/src/portable/mentor/musb/hcd_musb.c
@@ -847,8 +847,10 @@ bool hcd_edpt_clear_stall(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
 /*-------------------------------------------------------------------
  * ISR
  *-------------------------------------------------------------------*/
-void hcd_int_handler(uint8_t rhport)
+void hcd_int_handler(uint8_t rhport, bool in_isr)
 {
+  (void) in_isr;
+
   uint_fast8_t is, txis, rxis;
 
   is   = USB0->IS;   /* read and clear interrupt status */
diff --git a/src/portable/nxp/khci/hcd_khci.c b/src/portable/nxp/khci/hcd_khci.c
index 55327e02d..57684b259 100644
--- a/src/portable/nxp/khci/hcd_khci.c
+++ b/src/portable/nxp/khci/hcd_khci.c
@@ -447,6 +447,10 @@ void hcd_port_reset(uint8_t rhport)
   _hcd.need_reset = false;
 }
 
+void hcd_port_reset_end(uint8_t rhport) {
+  (void) rhport;
+}
+
 tusb_speed_t hcd_port_speed_get(uint8_t rhport)
 {
   (void)rhport;
@@ -583,8 +587,9 @@ bool hcd_edpt_clear_stall(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
 /*--------------------------------------------------------------------+
  * ISR
  *--------------------------------------------------------------------+*/
-void hcd_int_handler(uint8_t rhport)
+void hcd_int_handler(uint8_t rhport, bool in_isr)
 {
+  (void) in_isr;
   uint32_t is  = KHCI->ISTAT;
   uint32_t msk = KHCI->INTEN;
 
diff --git a/src/portable/ohci/ohci.c b/src/portable/ohci/ohci.c
index 413e72037..f978b0965 100644
--- a/src/portable/ohci/ohci.c
+++ b/src/portable/ohci/ohci.c
@@ -667,8 +667,9 @@ static void done_queue_isr(uint8_t hostid)
   }
 }
 
-void hcd_int_handler(uint8_t hostid)
-{
+void hcd_int_handler(uint8_t hostid, bool in_isr) {
+  (void) in_isr;
+
   uint32_t const int_en     = OHCI_REG->interrupt_enable;
   uint32_t const int_status = OHCI_REG->interrupt_status & int_en;
 
diff --git a/src/portable/raspberrypi/rp2040/hcd_rp2040.c b/src/portable/raspberrypi/rp2040/hcd_rp2040.c
index 21dc3f67d..4ed6d36bb 100644
--- a/src/portable/raspberrypi/rp2040/hcd_rp2040.c
+++ b/src/portable/raspberrypi/rp2040/hcd_rp2040.c
@@ -252,9 +252,9 @@ static void __tusb_irq_path_func(hcd_rp2040_irq)(void)
   }
 }
 
-void __tusb_irq_path_func(hcd_int_handler)(uint8_t rhport)
-{
+void __tusb_irq_path_func(hcd_int_handler)(uint8_t rhport, bool in_isr) {
   (void) rhport;
+  (void) in_isr;
   hcd_rp2040_irq();
 }
 
diff --git a/src/portable/renesas/rusb2/hcd_rusb2.c b/src/portable/renesas/rusb2/hcd_rusb2.c
index 790cd6b32..bf95be707 100644
--- a/src/portable/renesas/rusb2/hcd_rusb2.c
+++ b/src/portable/renesas/rusb2/hcd_rusb2.c
@@ -771,8 +771,9 @@ bool hcd_edpt_clear_stall(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
 //--------------------------------------------------------------------+
 // ISR
 //--------------------------------------------------------------------+
-void hcd_int_handler(uint8_t rhport)
-{
+void hcd_int_handler(uint8_t rhport, bool in_isr) {
+  (void) in_isr;
+
   rusb2_reg_t* rusb = RUSB2_REG(rhport);
   unsigned is0 = rusb->INTSTS0;
   unsigned is1 = rusb->INTSTS1;
diff --git a/src/portable/template/hcd_template.c b/src/portable/template/hcd_template.c
index 3e3b91558..b073d6057 100644
--- a/src/portable/template/hcd_template.c
+++ b/src/portable/template/hcd_template.c
@@ -51,8 +51,9 @@ bool hcd_init(uint8_t rhport) {
 }
 
 // Interrupt Handler
-void hcd_int_handler(uint8_t rhport) {
+void hcd_int_handler(uint8_t rhport, bool in_isr) {
   (void) rhport;
+  (void) in_isr;
 }
 
 // Enable USB interrupt
diff --git a/src/tusb.h b/src/tusb.h
index d6534ca28..c9d56d3c3 100644
--- a/src/tusb.h
+++ b/src/tusb.h
@@ -66,7 +66,7 @@
   #endif
 #else
   #ifndef tuh_int_handler
-  #define tuh_int_handler(_x)
+  #define tuh_int_handler(...)
   #endif
 #endif
 
@@ -123,7 +123,7 @@
   #endif
 #else
   #ifndef tud_int_handler
-  #define tud_int_handler(_x)
+  #define tud_int_handler(...)
   #endif
 #endif