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Commit c019b4be authored by Richard Cochran's avatar Richard Cochran Committed by David S. Miller
Browse files

mv88e6xxx: 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 6138e687

drivers/net/dsa/mv88e6xxx/ptp.c

+6 −0
Original line number Diff line number Diff line
@@ -280,6 +280,12 @@ static int mv88e6352_ptp_enable_extts(struct mv88e6xxx_chip *chip, 
				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;



	pin = ptp_find_pin(chip->ptp_clock, PTP_PF_EXTTS, rq->extts.index);



	if (pin < 0)