From 836eecc2f92be7b02503bc431e9df1c8a6287b2b Mon Sep 17 00:00:00 2001
From: wdfk-prog <1425075683@qq.com>
Date: Thu, 20 Nov 2025 09:06:46 +0800
Subject: [PATCH] fix:[STM32][drv_can] Suppress unused variable warning in send
 error path

---
 bsp/stm32/libraries/HAL_Drivers/drivers/drv_can.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bsp/stm32/libraries/HAL_Drivers/drivers/drv_can.c b/bsp/stm32/libraries/HAL_Drivers/drivers/drv_can.c
index 5022c37a81..e40532ab22 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drivers/drv_can.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drivers/drv_can.c
@@ -551,6 +551,7 @@ static rt_ssize_t _can_sendmsg(struct rt_can_device *can, const void *buf, rt_ui
 
         if (HAL_IS_BIT_SET(hcan->Instance->TSR, tme_flag) != SET)
         {
+            RT_UNUSED(mailbox_mask);
             return -RT_ERROR;
         }