Re: [PATCH v2 net 4/9] net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC

[Vladimir Oltean]

On Wed, Feb 19, 2025 at 01:42:42PM +0800, Wei Fang wrote:
> Actually ENETC VFs do not support HWTSTAMP_TX_ONESTEP_SYNC because only
> ENETC PF can access PMa_SINGLE_STEP registers. And there will be a crash
> if VFs are used to test one-step timestamp, the crash log as follows.
> 
> [  129.110909] Unable to handle kernel paging request at virtual address 00000000000080c0
> [  129.287769] Call trace:
> [  129.290219]  enetc_port_mac_wr+0x30/0xec (P)
> [  129.294504]  enetc_start_xmit+0xda4/0xe74
> [  129.298525]  enetc_xmit+0x70/0xec
> [  129.301848]  dev_hard_start_xmit+0x98/0x118
> 
> Fixes: 41514737ecaa ("enetc: add get_ts_info interface for ethtool")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Wei Fang <wei.fang@xxxxxxx>
> ---

Reviewed-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Tested-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>