From 5b019a7d8e7a41f9cddab9480d4a69c573e3f8ff Mon Sep 17 00:00:00 2001
From: yangsong8 <yangsong8@xiaomi.com>
Date: Fri, 18 Oct 2024 21:47:51 +0800
Subject: [PATCH] ptmx: When alloc minor, skip the start addr if it has been
 used

---
 drivers/serial/ptmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/serial/ptmx.c b/drivers/serial/ptmx.c
index 467afe09d09..584b88cecd5 100644
--- a/drivers/serial/ptmx.c
+++ b/drivers/serial/ptmx.c
@@ -149,7 +149,7 @@ static int ptmx_minor_allocate(void)
        * prevent (unexpected) infinite loops.
        */
 
-      if (startaddr == minor)
+      if (startaddr == g_ptmx.px_next)
         {
           /* We are back where we started... the are no free device address */