Messages in this thread Patch in this message | | | From | Harini Katakam <> | Subject | [PATCH] net: macb: Fix ptp time adjustment for large negative delta | Date | Wed, 20 Jun 2018 17:04:20 +0530 |
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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> --- drivers/net/ethernet/cadence/macb_ptp.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/cadence/macb_ptp.c b/drivers/net/ethernet/cadence/macb_ptp.c index 2220c77..6788351 100644 --- 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); -- 2.7.4
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