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Commit 58c98be1 authored by Richard Cochran's avatar Richard Cochran Committed by David S. Miller
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net: igb: fix the start time for periodic output signals 



When programming the start of a periodic output, the code wrongly places
the seconds value into the "low" register and the nanoseconds into the
"high" register.  Even though this is backwards, it slipped through my
testing, because the re-arming code in the interrupt service routine is
correct, and the signal does appear starting with the second edge.

This patch fixes the issue by programming the registers correctly.

Signed-off-by: default avatarRichard Cochran <richardcochran@gmail.com>
Reviewed-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Acked-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8b13b4e0

drivers/net/ethernet/intel/igb/igb_ptp.c

+2 −2
Original line number Diff line number Diff line
@@ -538,8 +538,8 @@ static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp, 
			igb->perout[i].start.tv_nsec = rq->perout.start.nsec;

			igb->perout[i].period.tv_sec = ts.tv_sec;

			igb->perout[i].period.tv_nsec = ts.tv_nsec;

			wr32(trgttiml, rq->perout.start.sec);

			wr32(trgttimh, rq->perout.start.nsec);

			wr32(trgttimh, rq->perout.start.sec);

			wr32(trgttiml, rq->perout.start.nsec);

			tsauxc |= tsauxc_mask;

			tsim |= tsim_mask;

		} else {