socket can error write: No buffer space available

1、查看

root@socfpga:/sys/class/net/can0# cat tx_queue_len

10

2、root@socfpga:/sys/class/net/can0# echo 4096 > tx_queue_len

3、root@socfpga:/sys/class/net/can0# cat tx_queue_len
4096

4、再运行程序