Hi all, I am using Linux 4.4 on SAMA5D3 MPU to run an application written in C. Sometimes this application must switch off a MPU CAN controller. It will be done by putting a "/sbin/ip link set CAN0 down" string in a pipe. This cause a call of at91_close() function in at91_can.c driver. If MPU is only one CAN node on the bus it retransmitts frame to send due noACK error. Sometimes after switch off CAN controler by at91_close() function the CAN bus remains dominant. It can be prevented by adding a delay before clk_disable_unprepare() call in at91_close() function. Waiting for AT91_MR_CANEN bit cleared don't help. Does anyone have had such problem? Best regards, Efim
