enic: fixes for review items from Ben Hutchings

Fixes for review items from Ben Hutchings:
 - use netdev->net_stats rather than private net_stats
 - use ethtool op .get_sset_count rather than .get_stats_count
 - err out if setting Tx/Rx csum or TSO using ethtool and setting is
   not enabled for device.
 - pass in jiffies + constant to round_jiffies
 - return err if new MTU is out-of-bounds

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

2 files changed, 37 insertions, 26 deletions

diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index fb83c926da5..9e0d484deb2 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -75,7 +75,6 @@ struct enic {
         struct vnic_enet_config config;
         struct vnic_dev_bar bar0;
         struct vnic_dev *vdev;
-        struct net_device_stats net_stats;
         struct timer_list notify_timer;
         struct work_struct reset;
         struct msix_entry msix_entry[ENIC_MSIX_MAX];
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index e6d5f116ad7..03b646a5aec 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -43,7 +43,6 @@
 #include "enic.h"
 
 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
-#define ENIC_JUMBO_FIRST_BUF_SIZE       256
 
 /* Supported devices */
 static struct pci_device_id enic_id_table[] = {
@@ -167,9 +166,14 @@ static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
         }
 }
 
-static int enic_get_stats_count(struct net_device *netdev)
+static int enic_get_sset_count(struct net_device *netdev, int sset)
 {
-        return enic_n_tx_stats + enic_n_rx_stats;
+        switch (sset) {
+        case ETH_SS_STATS:
+                return enic_n_tx_stats + enic_n_rx_stats;
+        default:
+                return -EOPNOTSUPP;
+        }
 }
 
 static void enic_get_ethtool_stats(struct net_device *netdev,
@@ -199,8 +203,10 @@ static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 {
         struct enic *enic = netdev_priv(netdev);
 
-        enic->csum_rx_enabled =
-                (data && ENIC_SETTING(enic, RXCSUM)) ? 1 : 0;
+        if (data && !ENIC_SETTING(enic, RXCSUM))
+                return -EINVAL;
+
+        enic->csum_rx_enabled = !!data;
 
         return 0;
 }
@@ -209,7 +215,10 @@ static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 {
         struct enic *enic = netdev_priv(netdev);
 
-        if (data && ENIC_SETTING(enic, TXCSUM))
+        if (data && !ENIC_SETTING(enic, TXCSUM))
+                return -EINVAL;
+
+        if (data)
                 netdev->features |= NETIF_F_HW_CSUM;
         else
                 netdev->features &= ~NETIF_F_HW_CSUM;
@@ -221,7 +230,10 @@ static int enic_set_tso(struct net_device *netdev, u32 data)
 {
         struct enic *enic = netdev_priv(netdev);
 
-        if (data && ENIC_SETTING(enic, TSO))
+        if (data && !ENIC_SETTING(enic, TSO))
+                return -EINVAL;
+
+        if (data)
                 netdev->features |=
                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
         else
@@ -250,7 +262,7 @@ static struct ethtool_ops enic_ethtool_ops = {
         .set_msglevel = enic_set_msglevel,
         .get_link = ethtool_op_get_link,
         .get_strings = enic_get_strings,
-        .get_stats_count = enic_get_stats_count,
+        .get_sset_count = enic_get_sset_count,
         .get_ethtool_stats = enic_get_ethtool_stats,
         .get_rx_csum = enic_get_rx_csum,
         .set_rx_csum = enic_set_rx_csum,
@@ -652,25 +664,26 @@ static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 {
         struct enic *enic = netdev_priv(netdev);
+        struct net_device_stats *net_stats = &netdev->stats;
         struct vnic_stats *stats;
 
         spin_lock(&enic->devcmd_lock);
         vnic_dev_stats_dump(enic->vdev, &stats);
         spin_unlock(&enic->devcmd_lock);
 
-        enic->net_stats.tx_packets = stats->tx.tx_frames_ok;
-        enic->net_stats.tx_bytes = stats->tx.tx_bytes_ok;
-        enic->net_stats.tx_errors = stats->tx.tx_errors;
-        enic->net_stats.tx_dropped = stats->tx.tx_drops;
+        net_stats->tx_packets = stats->tx.tx_frames_ok;
+        net_stats->tx_bytes = stats->tx.tx_bytes_ok;
+        net_stats->tx_errors = stats->tx.tx_errors;
+        net_stats->tx_dropped = stats->tx.tx_drops;
 
-        enic->net_stats.rx_packets = stats->rx.rx_frames_ok;
-        enic->net_stats.rx_bytes = stats->rx.rx_bytes_ok;
-        enic->net_stats.rx_errors = stats->rx.rx_errors;
-        enic->net_stats.multicast = stats->rx.rx_multicast_frames_ok;
-        enic->net_stats.rx_crc_errors = stats->rx.rx_crc_errors;
-        enic->net_stats.rx_dropped = stats->rx.rx_no_bufs;
+        net_stats->rx_packets = stats->rx.rx_frames_ok;
+        net_stats->rx_bytes = stats->rx.rx_bytes_ok;
+        net_stats->rx_errors = stats->rx.rx_errors;
+        net_stats->multicast = stats->rx.rx_multicast_frames_ok;
+        net_stats->rx_crc_errors = stats->rx.rx_crc_errors;
+        net_stats->rx_dropped = stats->rx.rx_no_bufs;
 
-        return &enic->net_stats;
+        return net_stats;
 }
 
 static void enic_reset_mcaddrs(struct enic *enic)
@@ -1109,7 +1122,8 @@ static void enic_notify_timer(unsigned long data)
 
         enic_notify_check(enic);
 
-        mod_timer(&enic->notify_timer, round_jiffies(ENIC_NOTIFY_TIMER_PERIOD));
+        mod_timer(&enic->notify_timer,
+                round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
 }
 
 static void enic_free_intr(struct enic *enic)
@@ -1313,14 +1327,12 @@ static int enic_change_mtu(struct net_device *netdev, int new_mtu)
         struct enic *enic = netdev_priv(netdev);
         int running = netif_running(netdev);
 
+        if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
+                return -EINVAL;
+
         if (running)
                 enic_stop(netdev);
 
-        if (new_mtu < ENIC_MIN_MTU)
-                new_mtu = ENIC_MIN_MTU;
-        if (new_mtu > ENIC_MAX_MTU)
-                new_mtu = ENIC_MAX_MTU;
-
         netdev->mtu = new_mtu;
 
         if (netdev->mtu > enic->port_mtu)