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author | Harini Katakam <harini.katakam@xilinx.com> | 2018-06-20 14:34:20 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-22 15:28:44 +0300 |
commit | f389c17b8dc54b474d33728e5882dcc276a467fa (patch) | |
tree | 251ad26a9253a3d998ab4d53a7b41dbfe26dc270 /drivers/net/ethernet/cadence | |
parent | b364a914c4993f46c0d849dab20d67ba0d82809d (diff) | |
download | linux-f389c17b8dc54b474d33728e5882dcc276a467fa.tar.xz |
net: macb: Fix ptp time adjustment for large negative delta
[ Upstream commit 64d7839af8c8f67daaf9bf387135052c55d85f90 ]
When delta passed to gem_ptp_adjtime is negative, the sign is
maintained in the ns_to_timespec64 conversion. Hence timespec_add
should be used directly. timespec_sub will just subtract the negative
value thus increasing the time difference.
Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ethernet/cadence')
-rwxr-xr-x | drivers/net/ethernet/cadence/macb_ptp.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/net/ethernet/cadence/macb_ptp.c b/drivers/net/ethernet/cadence/macb_ptp.c index 2220c771092b..678835136bf8 100755 --- a/drivers/net/ethernet/cadence/macb_ptp.c +++ b/drivers/net/ethernet/cadence/macb_ptp.c @@ -170,10 +170,7 @@ static int gem_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) if (delta > TSU_NSEC_MAX_VAL) { gem_tsu_get_time(&bp->ptp_clock_info, &now); - if (sign) - now = timespec64_sub(now, then); - else - now = timespec64_add(now, then); + now = timespec64_add(now, then); gem_tsu_set_time(&bp->ptp_clock_info, (const struct timespec64 *)&now); |