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igb: Reject requests that fail to enable time stamping on both edges.

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This hardware always time stamps rising and falling edges, and so this
patch validates that the request does contains both edges.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Cochran 2019-11-14 10:45:05 -08:00 committed by David S. Miller
parent 9289252bd1
commit 5a450eb388
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/intel/igb/igb_ptp.c
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@ -528,6 +528,12 @@ static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp,
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
/* Reject requests failing to enable both edges. */
if ((rq->extts.flags & PTP_STRICT_FLAGS) &&
(rq->extts.flags & PTP_ENABLE_FEATURE) &&
(rq->extts.flags & PTP_EXTTS_EDGES) != PTP_EXTTS_EDGES)
return -EOPNOTSUPP;
if (on) {
pin = ptp_find_pin(igb->ptp_clock, PTP_PF_EXTTS,
rq->extts.index);