From 5633a19a37892415428333cfc30d5db82bcfd83a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabian=20H=C3=BC=C3=9Fler?= <fabian.huessler@ml-pa.com>
Date: Wed, 5 Feb 2025 20:24:24 +0100
Subject: [PATCH] drivers/at: at_readline_stop_at_str fix remaining buffer
 length

---
 drivers/at/at.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/at/at.c b/drivers/at/at.c
index e42b1f8c6c..d4fc81476a 100644
--- a/drivers/at/at.c
+++ b/drivers/at/at.c
@@ -513,7 +513,6 @@ static ssize_t at_readline_stop_at_str(at_dev_t *dev, char *resp_buf, size_t len
         }
 
         resp_pos++;
-        len--;
 
         if ((size_t)(resp_pos - resp_buf) >= strlen(AT_RECV_EOL)) {
             char *const eol_begin = resp_pos - strlen(AT_RECV_EOL);
@@ -534,8 +533,10 @@ static ssize_t at_readline_stop_at_str(at_dev_t *dev, char *resp_buf, size_t len
                 substr_p++;
             }
         }
+
+        len--;
     }
-    if (len <= 1) {
+    if (len == 1) {
         return -ENOBUFS;
     }
     if (res < 0) {