[PATCH NET-NEXT 09/10] igb: stub support for SIOCSHWTSTAMP

[Patrick Ohly <patrick.ohly@intel.com>]

Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
---
 drivers/net/igb/igb_main.c |   31 +++++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 8b2ba42..90090bb 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -34,6 +34,7 @@
 #include <linux/ipv6.h>
 #include <net/checksum.h>
 #include <net/ip6_checksum.h>
+#include <linux/net_tstamp.h>
 #include <linux/mii.h>
 #include <linux/ethtool.h>
 #include <linux/if_vlan.h>
@@ -4182,6 +4183,34 @@ static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 }
 
 /**
+ * igb_hwtstamp_ioctl - control hardware time stamping
+ * @netdev:
+ * @ifreq:
+ * @cmd:
+ *
+ * Currently cannot enable any kind of hardware time stamping, but
+ * supports SIOCSHWTSTAMP in general.
+ **/
+static int igb_hwtstamp_ioctl(struct net_device *netdev,
+			      struct ifreq *ifr, int cmd)
+{
+	struct hwtstamp_config config;
+
+	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+		return -EFAULT;
+
+	/* reserved for future extensions */
+	if (config.flags)
+		return -EINVAL;
+
+	if (config.tx_type == HWTSTAMP_TX_OFF &&
+		config.rx_filter == HWTSTAMP_FILTER_NONE)
+		return 0;
+
+	return -ERANGE;
+}
+
+/**
  * igb_ioctl -
  * @netdev:
  * @ifreq:
@@ -4194,6 +4223,8 @@ static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 	case SIOCGMIIREG:
 	case SIOCSMIIREG:
 		return igb_mii_ioctl(netdev, ifr, cmd);
+	case SIOCSHWTSTAMP:
+		return igb_hwtstamp_ioctl(netdev, ifr, cmd);
 	default:
 		return -EOPNOTSUPP;
 	}
-- 
1.6.1.2