diff options
| author |   Richard Cochran <richardcochran@gmail.com> | 2019-11-14 10:45:03 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-11-15 12:48:32 -0800 |
| commit | c019b4be5de0d53fff4aa309322397605f634e27 (patch) | |
| tree | 8fac791d14bfc59ae6be68fdd25bafc706e0ca84 /drivers | |
| parent | ptp: Introduce strict checking of external time stamp options. (diff) | |
| download | linux-dev-c019b4be5de0d53fff4aa309322397605f634e27.tar.xz linux-dev-c019b4be5de0d53fff4aa309322397605f634e27.zip | |
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: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/ptp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/ptp.c b/drivers/net/dsa/mv88e6xxx/ptp.c index 3b1985902f95..d838c174dc0d 100644 --- a/drivers/net/dsa/mv88e6xxx/ptp.c +++ b/drivers/net/dsa/mv88e6xxx/ptp.c @@ -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) |