From 96e722ed77f7359da537e8dce8cadceb9f7108d9 Mon Sep 17 00:00:00 2001
From: tmk <hasu@tmk-kbd.com>
Date: Wed, 27 Oct 2021 00:34:34 +0900
Subject: [PATCH] ibmpc: Return host_send when receiving

- To avoid missing key stroke during command sending
- LED lock indicators can be out of sync due to this
---
 tmk_core/protocol/ibmpc.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tmk_core/protocol/ibmpc.cpp b/tmk_core/protocol/ibmpc.cpp
index 71e4fd86..95f69e17 100644
--- a/tmk_core/protocol/ibmpc.cpp
+++ b/tmk_core/protocol/ibmpc.cpp
@@ -92,6 +92,13 @@ int16_t IBMPC::host_send(uint8_t data)
 
     dprintf("w%02X ", data);
 
+    // Return when receiving data
+    //if (isr_state & 0x0FFF) {
+    if (isr_state != 0x8000) {
+        dprintf("isr:%04X ", isr_state);
+        return -1;
+    }
+
     int_off();
 
 RETRY: