From bbf80875fb6be49de54f94847d176caceac8822f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=81=AB=E7=84=9A=20=E5=AF=8C=E8=89=AF?= <es@m-labs.hk>
Date: Mon, 13 Mar 2023 18:18:26 +0800
Subject: [PATCH] firmware: assume empty config records as removed (#2064)

This will return `KeyNotFound` for empty values, which are produced by `remove` operation

Signed-off-by: Egor Savkin <es@m-labs.hk>
---
 artiq/firmware/libboard_misoc/config.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/artiq/firmware/libboard_misoc/config.rs b/artiq/firmware/libboard_misoc/config.rs
index 51f71ac33..e5e62ad0c 100644
--- a/artiq/firmware/libboard_misoc/config.rs
+++ b/artiq/firmware/libboard_misoc/config.rs
@@ -163,7 +163,7 @@ mod imp {
             while let Some(result) = iter.next() {
                 let (record_key, record_value) = result?;
                 if key.as_bytes() == record_key {
-                    found = true;
+                    found = !record_value.is_empty();
                     // last write wins
                     value = record_value
                 }