Commit 9289252b authored by Richard Cochran's avatar Richard Cochran Committed by David S. Miller
Browse files

dp83640: Reject requests to enable time stamping on both edges.



This driver enables rising edge or falling edge, but not both, and so
this patch validates that the request contains only one of the two
edges.
Signed-off-by: default avatarRichard Cochran <richardcochran@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c019b4be
......@@ -475,6 +475,13 @@ static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
/* Reject requests to enable time stamping on 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;
index = rq->extts.index;
if (index >= N_EXT_TS)
return -EINVAL;
......
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