[PATCH] net/iavf: check PTP capabilities during init

[Bruce Richardson]

On Tue, Nov 25, 2025 at 03:57:10PM -0800, Jacob Keller wrote:
> 
> 
> On 11/25/2025 5:12 AM, Bruce Richardson wrote:
> > On Tue, Nov 25, 2025 at 10:30:37AM +0000, Hore, Soumyadeep wrote:
> >> Hi Jacob,
> >>
> >> Currently PTP features are not enabled in DPDK. We only have the Rx timestamp API in place. Typically the change that you want needs to be implemented in ethdev_ops.timesync_enable(), which is not implemented.
> >>
> > At this stage we are post final RC for 25.11, so taking this patch would be
> > risky anyway. Let's target 26.03 for this, and then look to  backport to
> > 25.11.1
> > 
> > Thanks,
> > /Bruce
> 
> Sure. In that case i think we need to revert the other change that
> checked the RX_TIMESTAMP flag as it corrected one issue but caused a
> regression in Rx timestamp offload when it *is* functional.
> 
> I think its commit d21c2fe6e5a1 ("net/iavf: fix check for PF Rx
> timestamp support"). That commit without this fix will incorrectly
> prevent enabling Rx timestamps.
> 
I've sent a revert patch now[1]. Please verify that this revert is correct
and ok for inclusion as a last-minute fix in final 25.11 release.

Thanks,
/Bruce

[1] https://patches.dpdk.org/project/dpdk/patch/20251126165943.1536164-1-bruce.richardson@intel.com/