From: Voon Weifeng <weifeng.v...@intel.com>
Date: Wed, 19 Jun 2019 22:13:48 +0800
> From: Roland Hii <roland.king.guan....@intel.com>
>
> When ADDSUB bit is set, the system time seconds field is calculated as
> the complement of the seconds part of the update value.
>
> For example, if 3.000000001 seconds need to be subtracted from the
> system time, this field is calculated as
> 2^32 - 3 = 4294967296 - 3 = 0x100000000 - 3 = 0xFFFFFFFD
>
> Previously, the 0x100000000 is mistakenly written as 100000000.
>
> This is further simplified from
> sec = (0x100000000ULL - sec);
> to
> sec = -sec;
>
> Fixes: ba1ffd74df74 ("stmmac: fix PTP support for GMAC4")
> Signed-off-by: Roland Hii <roland.king.guan....@intel.com>
> Signed-off-by: Ong Boon Leong <boon.leong....@intel.com>
> Signed-off-by: Voon Weifeng <weifeng.v...@intel.com>
Applied and queued up for -stable.
