Messages in this thread | | | Subject | Re: [PATCH 3/3] phy: nxp-c45-tja11xx: read the tx timestamp without lock | From | "Radu Nicolae Pirea (NXP OSS)" <> | Date | Wed, 22 Dec 2021 10:19:30 +0200 |
| |
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: > > 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
| |