From dfa951b111c407e76996c3d7fcde927f8cf3c078 Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Sat, 13 Jul 2019 16:29:15 +0200
Subject: [PATCH] hci: use 2 bytes as HCI incoming pre-buffer without Classic
 for GATT Client

---
 src/hci.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/hci.h b/src/hci.h
index 4a33cd13f..b3a97096e 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -132,12 +132,12 @@ extern "C" {
 #endif
 #endif
 
-// BNEP may uncompress the IP Header by 16 bytes
+// BNEP may uncompress the IP Header by 16 bytes, GATT Client requires two additional bytes for long characteristic reads
 #ifndef HCI_INCOMING_PRE_BUFFER_SIZE
 #ifdef ENABLE_CLASSIC
 #define HCI_INCOMING_PRE_BUFFER_SIZE (16 - HCI_ACL_HEADER_SIZE - 4)
 #else
-#define HCI_INCOMING_PRE_BUFFER_SIZE 0
+#define HCI_INCOMING_PRE_BUFFER_SIZE 2
 #endif
 #endif