From b7c8cb3c41ba0fc7f9c0db9379d5c65871f6374d Mon Sep 17 00:00:00 2001
From: Ryzee119 <wendland@live.com.au>
Date: Sun, 29 May 2022 14:00:36 +0930
Subject: [PATCH] Hub: Unplug downstream devices on non-root hub disconnect

---
 src/host/usbh.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/host/usbh.c b/src/host/usbh.c
index e0e41a8d..af2ad057 100644
--- a/src/host/usbh.c
+++ b/src/host/usbh.c
@@ -1107,6 +1107,12 @@ static void process_device_unplugged(uint8_t rhport, uint8_t hub_addr, uint8_t h
     {
       TU_LOG2("  Address = %u\r\n", dev_addr);
 
+      // If the device itself is a usb hub, unplug downstream devices.
+      if (dev_addr > CFG_TUH_DEVICE_MAX)
+      {
+        process_device_unplugged(rhport, dev_addr, 0);
+      }
+
       // Invoke callback before close driver
       if (tuh_umount_cb) tuh_umount_cb(dev_addr);