Hi Dinh, On 3/8/2016 12:22 AM, Dinh Nguyen wrote: [snip] > > I'm seeing the same issue on the SoCFPGA platform: > > libphy: PHY stmmac-0:ffffffff not found > eth0: Could not attach to PHY > stmmac_open: Cannot attach to PHY (error: -19) > > If I just revert: > > "stmmac: Fix 'eth0: No PHY found' regression" > > then the issue goes away. do you have this patch "stmmac: first frame prep at the end of xmit routine" ? Or you just reverted "stmmac: Fix 'eth0: No PHY found' regression" maybe we can sum: "stmmac: Fix 'eth0: No PHY found' regression" that is introducing a problem when a box has a transceiver "stmmac: first frame prep at the end of xmit routine" That is breaking the tx path on arm64 I will check both patches on my side and let you know peppe > > Thanks, > Dinh >