Re: [Linuxptp-users] Problems with hardware time stamping with PHY DP83640 on MCP5200 powerpc platform

[Stephan G. <st...@ga...>]

Hello Richard,

I'm a colleague of Mario and we found the reason for the strange data 
int the skb.

> Wow, that looks really wrong. I don't see a MAC address anywhere.
>

The problem lies in the file 
linux/drivers/net/ethernet/freescale/fec_mpc52xx.c

In the receive interrupt function mpc52xx_fec_rx_interrupt
the call to skb_defer_rx_timestamp is done using  a freshly allocated 
skb (called skb) and not with the received skb (called rskb). Calling 
skb_defer_rx_timestamp with the correct parameter engages  the whole engine.

We would be happy to make a patch for this fix. Do you think the powerpc 
mailing list is more suitable than the linux-netdev?

Regards,

Stephan