diff options
Diffstat (limited to 'include/uapi/linux/ethtool.h')
| -rw-r--r-- | include/uapi/linux/ethtool.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index cd67aec187d9..cd1629170103 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -1093,6 +1093,11 @@ struct ethtool_sfeatures { * the 'hwtstamp_tx_types' and 'hwtstamp_rx_filters' enumeration values, * respectively. For example, if the device supports HWTSTAMP_TX_ON, * then (1 << HWTSTAMP_TX_ON) in 'tx_types' will be set. + * + * Drivers should only report the filters they actually support without + * upscaling in the SIOCSHWTSTAMP ioctl. If the SIOCSHWSTAMP request for + * HWTSTAMP_FILTER_V1_SYNC is supported by HWTSTAMP_FILTER_V1_EVENT, then the + * driver should only report HWTSTAMP_FILTER_V1_EVENT in this op. */ struct ethtool_ts_info { __u32 cmd; |