From fa69b74e6c10e4fb0bfbd67c11cdca7ef1bd2d18 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 11 Oct 2025 06:25:44 -1000
Subject: [PATCH] tweak comments

---
 esphome/components/usb_host/usb_host_client.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/esphome/components/usb_host/usb_host_client.cpp b/esphome/components/usb_host/usb_host_client.cpp
index 91d7af2898..2139ed869a 100644
--- a/esphome/components/usb_host/usb_host_client.cpp
+++ b/esphome/components/usb_host/usb_host_client.cpp
@@ -429,6 +429,7 @@ static void transfer_callback(usb_transfer_t *xfer) {
   }
 
   // Release transfer slot AFTER callback completes to prevent slot exhaustion
+  // This is critical for high-throughput transfers (e.g., USB UART at 115200 baud)
   // The callback has finished accessing xfer->data_buffer, so it's safe to release
   // The release_trq() uses thread-safe atomic operations
   trq->client->release_trq(trq);