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

On Mon, 2021-12-20 at 16:10 +0100, Andrew Lunn wrote:

On Mon, Dec 20, 2021 at 02:08:59PM +0200, Radu Pirea (NXP OSS) wrote:

quoted

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.

Actually this is the second issue.
I will improve the description.

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

Yes, it's safe. The purpose of the mutex is to protect the access to
LTC(PTP counter).

        Andrew