mpremote/mount: Add ioctl to specify large read buffer size.

pi-anl · pi-anl · commit d9d09760d283 · 2023-11-08T10:14:28.000+11:00
Speeds up importing files from mounted filesystem.

Also fix the return code for invalid / unsupported ioctl requests.

Signed-off-by: Andrew Leech &lt;andrew.leech@planetinnovation.com.au&gt;
diff --git a/tools/mpremote/mpremote/transport_serial.py b/tools/mpremote/mpremote/transport_serial.py
@@ -753,7 +753,9 @@ def ioctl(self, request, arg):
             machine.mem32[arg] = self.seek(machine.mem32[arg], machine.mem32[arg + 4])
         elif request == 4:  # CLOSE
             self.close()
-        return 0
+        elif request == 11:  # BUFSIZE
+            return 255
+        return -1
 
     def flush(self):
         pass
