From 8f58669ddddd83fc2820ea8a6689b8d175265783 Mon Sep 17 00:00:00 2001
From: Scott Shawcroft <scott@tannewt.org>
Date: Fri, 11 Sep 2020 16:17:20 -0700
Subject: [PATCH] Fix bug with socket.recv_into size == 0.

It returned 0 when it should have filled the buffer.

Python reference: https://docs.python.org/3/library/socket.html#socket.socket.recv_into
---
 shared-bindings/socketpool/Socket.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/shared-bindings/socketpool/Socket.c b/shared-bindings/socketpool/Socket.c
index 250e9c874e..e1b1e69672 100644
--- a/shared-bindings/socketpool/Socket.c
+++ b/shared-bindings/socketpool/Socket.c
@@ -261,7 +261,7 @@ STATIC mp_obj_t socketpool_socket_recv_into(size_t n_args, const mp_obj_t *args)
     mp_int_t len = bufinfo.len;
     if (n_args == 3) {
         mp_int_t given_len = mp_obj_get_int(args[2]);
-        if (given_len < len) {
+        if (given_len > 0 && given_len < len) {
             len = given_len;
         }
     }