From 3775fe736924dd2e4c50728e0af4fc51d8166790 Mon Sep 17 00:00:00 2001
From: Jouni Ukkonen <jouni.ukkonen@unikie.com>
Date: Mon, 7 Oct 2024 08:41:09 +0300
Subject: [PATCH] usbdev/cdcacm: Fix read queue counter in shutdown

nrdq is already set 0 in resetconfig.

Signed-off-by: Jouni Ukkonen <jouni.ukkonen@unikie.com>
---
 drivers/usbdev/cdcacm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usbdev/cdcacm.c b/drivers/usbdev/cdcacm.c
index efffdd1a49048..0e52ae599f2d3 100644
--- a/drivers/usbdev/cdcacm.c
+++ b/drivers/usbdev/cdcacm.c
@@ -1125,7 +1125,10 @@ static void cdcacm_rdcomplete(FAR struct usbdev_ep_s *ep,
     case -ESHUTDOWN: /* Disconnection */
       {
         usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_RDSHUTDOWN), 0);
-        priv->nrdq--;
+        if (priv->nrdq != 0)
+          {
+            priv->nrdq--;
+          }
       }
       break;