Re: [Linuxptp-users] ptp4l and network connectivity interruption

[Richard C. <ric...@gm...>]

On Fri, Dec 11, 2015 at 03:09:56PM -0500, Brian Walsh wrote:
> I was looking at the linuxptp code to see if it could possibly detect the
> condition. It does detect the initial jump when the hardware starts
> receiving packets again. Maybe it could check the jump against the last
> known offset value. Have it wait for a few packets while the device
> settles before trusting that jump if it is close to the offset.

This is definitely a driver bug.

Looking at drivers/net/ethernet/intel/e1000e/netdev.c, in the function
e1000e_config_hwtstamp(), the time is reset whenever time stamping is
activated.  That doesn't make any sense.

It looks like the calls to e1000e_get_base_timinca() and
timecounter_init() are misplaced.  They should go into the probe
function instead.

Thanks,
Richard