Re: [PATCH 3/3] phy: nxp-c45-tja11xx: read the tx timestamp without lock

From: Andrew Lunn
Date: Mon Dec 20 2021 - 10:12:52 EST


On Mon, Dec 20, 2021 at 02:08:59PM +0200, Radu Pirea (NXP OSS) wrote:
> The tx timestamps are read from only one place in interrupt or polling
> mode. Locking the mutex is useless.

You cannot take a mutex in an interrupt handler. So your description
is probably not accurate.

Is it safe for other ptp operations to be performed in parallel with
reading the TX timestamp? _nxp_c45_ptp_settime64()?

Andrew