From b0aacc88f3e764a84707b0c4f8e334777988d1e0 Mon Sep 17 00:00:00 2001
From: Andrew Leech <>
Date: Wed, 1 Nov 2023 15:14:37 +1100
Subject: [PATCH] mpremote/mount: Add ioctl to specify large read buffer size.

Speeds up importing files from mounted filesystem.

Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
---
 tools/mpremote/mpremote/transport_serial.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/mpremote/mpremote/transport_serial.py b/tools/mpremote/mpremote/transport_serial.py
index e04f5b4ac9ab8..9a49685962178 100644
--- a/tools/mpremote/mpremote/transport_serial.py
+++ b/tools/mpremote/mpremote/transport_serial.py
@@ -753,6 +753,8 @@ def ioctl(self, request, arg):
             machine.mem32[arg] = self.seek(machine.mem32[arg], machine.mem32[arg + 4])
         elif request == 4:  # CLOSE
             self.close()
+        elif request == 11:  # BUFSIZE
+            return 255
         return 0
 
     def flush(self):