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

On 13/09/2026 0:16, 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 <redacted>

In all other drivers I just removed the assignment, why not do the same
here?