From b67a8152a507e6393d596e8df6af17d447699f6a Mon Sep 17 00:00:00 2001
From: yaomo718 <yaomo718@163.com>
Date: Thu, 25 Apr 2019 00:51:14 +0800
Subject: [components][drivers][can] can.c bug修复：
 在RT_CAN_USING_HDR宏关闭的时候，接收数据大小的计算应该是：已使用链表数*sizeof(struct
 rt_can_msg)。
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---
 components/drivers/can/can.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/drivers/can/can.c b/components/drivers/can/can.c
index 078d8bb64a..0769c79fd7 100644
--- a/components/drivers/can/can.c
+++ b/components/drivers/can/can.c
@@ -854,7 +854,7 @@ void rt_hw_can_isr(struct rt_can_device *can, int event)
 
                 level = rt_hw_interrupt_disable();
                 /* get rx length */
-                rx_length = rx_fifo->freenumbers * sizeof(struct rt_can_msg);
+                rx_length = rt_list_len(&rx_fifo->uselist)* sizeof(struct rt_can_msg);
                 rt_hw_interrupt_enable(level);
 
                 can->parent.rx_indicate(&can->parent, rx_length);
-- 
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