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authorRichard Cochran <richardcochran@gmail.com>2019-11-14 10:45:02 -0800
committerDavid S. Miller <davem@davemloft.net>2019-11-15 12:48:32 -0800
commit6138e687c7b679da08c0feb55a88f448f7890c07 (patch)
tree5fa29b3639962a57b0b0e7e81690311ff2b06710 /drivers/net/ethernet/intel
parentrenesas: reject unsupported external timestamp flags (diff)
downloadlinux-dev-6138e687c7b679da08c0feb55a88f448f7890c07.tar.xz
linux-dev-6138e687c7b679da08c0feb55a88f448f7890c07.zip
ptp: Introduce strict checking of external time stamp options.
User space may request time stamps on rising edges, falling edges, or both. However, the particular mode may or may not be supported in the hardware or in the driver. This patch adds a "strict" flag that tells drivers to ensure that the requested mode will be honored. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/intel')
-rw-r--r--drivers/net/ethernet/intel/igb/igb_ptp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index 0bce3e0f1af0..3fd60715bca7 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -524,7 +524,8 @@ static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp,
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
- PTP_FALLING_EDGE))
+ PTP_FALLING_EDGE |
+ PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
if (on) {