netdev - Re: RE: [Intel-wired-lan] [PATCH iwl-next v3] igb: Retrieve Tx timestamp directly from interrupt for i210

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Message-ID: <20260205100347.ssTBDAI_@linutronix.de>
Date: Thu, 5 Feb 2026 11:03:47 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
Cc: Kurt Kanzenbach <kurt@...utronix.de>,
	"Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
	"Kitszel, Przemyslaw" <przemyslaw.kitszel@...el.com>,
	Paul Menzel <pmenzel@...gen.mpg.de>,
	Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	"Gomes, Vinicius" <vinicius.gomes@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Richard Cochran <richardcochran@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Eric Dumazet <edumazet@...gle.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"Keller, Jacob E" <jacob.e.keller@...el.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: RE: [Intel-wired-lan] [PATCH iwl-next v3] igb: Retrieve Tx
 timestamp directly from interrupt for i210

On 2026-02-05 09:47:14 [+0000], Loktionov, Aleksandr wrote:
…
> > --- a/drivers/net/ethernet/intel/igb/igb_ptp.c
> > +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
> > @@ -796,6 +796,28 @@ static int igb_ptp_verify_pin(struct
…
> > +	igb_ptp_tx_hwtstamp(adapter); <-Calls existing function designed for work queue!
> 
> skb_tstamp_tx() can sleep
> Smells like sleep-in-atomic isn't it?

How or where can it sleep?

Sebastian