Subject: Re: [PATCH V4 2/3] can: m_can: update to support CAN FD features

From: Oliver Hartkopp <[email-masked]>
Date: Thu, 13 Nov 2014 17:56:55 +0100

On 11/13/2014 11:10 AM, Marc Kleine-Budde wrote:
> On 11/07/2014 09:45 AM, Dong Aisheng wrote:

>>  
>> -	if (id & RX_BUF_RTR) {
>> +	if (id & RX_BUF_ESI) {
>> +		cf->flags |= CANFD_ESI;
>> +		netdev_dbg(dev, "ESI Error\n");
>> +	}
>> +
>> +	if (!(dlc & RX_BUF_EDL) && (id & RX_BUF_RTR)) {
>>  		cf->can_id |= CAN_RTR_FLAG;
> 
> I just noticed, that you don't set the cf->dlc (or cf->len) in the RTR
> case. Please create a separate patch that fixes this problem.
> 
>>  	} else {
>>  		id = m_can_fifo_read(priv, fgi, M_CAN_FIFO_DLC);
>> -		cf->can_dlc = get_can_dlc((id >> 16) & 0x0F);
>> -		*(u32 *)(cf->data + 0) = m_can_fifo_read(priv, fgi,
>> -							 M_CAN_FIFO_DATA(0));
>> -		*(u32 *)(cf->data + 4) = m_can_fifo_read(priv, fgi,
>> -							 M_CAN_FIFO_DATA(1));
>> +		if (dlc & RX_BUF_EDL)
>> +			cf->len = can_dlc2len((id >> 16) & 0x0F);
>> +		else
>> +			cf->len = get_can_dlc((id >> 16) & 0x0F);
>> +

Grr. I missed that one too :-(

Thanks for catching it.

As you committed patch 1 & 3 you expect a new single patch containing the
(fixed) content of this patch 2, right?

Regards,
Oliver