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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: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Cochran 2015-06-11 14:51:30 +02:00 committed by David S. Miller
parent 8b13b4e0bc
commit 58c98be137
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/intel/igb/igb_ptp.c
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@ -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 {