From feaa2516742ed4f9032a0233dcec922ac6a4e80c Mon Sep 17 00:00:00 2001
From: Damien George
Date: Wed, 16 Oct 2019 17:24:40 +1100
Subject: extmod/modlwip: Make socket poll return POLLNVAL in case of bad file.

---
 extmod/modlwip.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'extmod')

diff --git a/extmod/modlwip.c b/extmod/modlwip.c
index cd0f6946c..1e9b8c459 100644
--- a/extmod/modlwip.c
+++ b/extmod/modlwip.c
@@ -1477,6 +1477,8 @@ STATIC mp_uint_t lwip_socket_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_
         } else if (socket->state == ERR_RST) {
             // Socket was reset by peer, a write will return an error
             ret |= flags & (MP_STREAM_POLL_WR | MP_STREAM_POLL_HUP);
+        } else if (socket->state == _ERR_BADF) {
+            ret |= MP_STREAM_POLL_NVAL;
         } else if (socket->state < 0) {
             // Socket in some other error state, use catch-all ERR flag
             // TODO: may need to set other return flags here
-- 
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