In bcm_ptp_perout_locked, the driver rejects requests which have
PTP_PEROUT_PHASE set. This appears to be an attempt to reject any
unsupported flags. Unfortunately, this only checks one flag, but does not
protect against PTP_PEROUT_ONE_SHOT, or any future flags which may be
added.
Fix the check to ensure that no flag other than the supported
PTP_PEROUT_DUTY_CYCLE is set.
Fixes: 7bfe91efd525 ("net: phy: Add support for 1PPS out and external timestamps")
Signed-off-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
---
drivers/net/phy/bcm-phy-ptp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/bcm-phy-ptp.c b/drivers/net/phy/bcm-phy-ptp.c
index 208e8f561e0696e64bd5e842b66d88c65d70bfc0..eba8b5fb1365f4e43331e479e8e2f3c4b590ab96 100644
--- a/drivers/net/phy/bcm-phy-ptp.c
+++ b/drivers/net/phy/bcm-phy-ptp.c
@@ -597,7 +597,8 @@ static int bcm_ptp_perout_locked(struct bcm_ptp_private *priv,
period = BCM_MAX_PERIOD_8NS; /* write nonzero value */
- if (req->flags & PTP_PEROUT_PHASE)
+ /* Reject unsupported flags */
+ if (req->flags & ~PTP_PEROUT_DUTY_CYCLE)
return -EOPNOTSUPP;
if (req->flags & PTP_PEROUT_DUTY_CYCLE)
--
2.48.1.397.gec9d649cc640
