[PATCH net] net: stmmac: report phc_index as -1 when no PTP clock is registered

[Maxime Chevallier]

Hi Lorenzo,

On 9/12/26 23:16, Lorenzo Bianconi wrote:
> When hardware timestamping is supported but no PTP clock has been
> registered yet (e.g. while the interface is down), stmmac_get_ts_info()
> currently reports phc_index as 0. Zero is a valid PHC index and would
> make userspace resolve the wrong clock; the absence of a clock should
> be reported as -1, matching ethtool_init_tsinfo() and
> ethtool_op_get_ts_info().
> 
> Report -1 when no PTP clock is available.
> 
> Fixes: 9364fa7fcf12 ("net: stmmac: Remove setting of RX software timestamp")
> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi at oss.qualcomm.com>

Ah nice, I've briefly saw that just yesterday but haven't started digging,
thanks for fixing this :)

Reviewed-by: Maxime Chevallier <maxime.chevallier at bootlin.com>

Maxime