pch_gbe: Validate hwtstamp_config completely before applying it

hwtstamp_ioctl() should validate all fields of hwtstamp_config
before making any changes.  Currently it sets the TX configuration
before validating the rx_filter field.

Compile-tested only.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
index 5a0f04c..27ffe0e 100644 (file)
--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
@@ -245,16 +245,8 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
        /* Get ieee1588's dev information */
        pdev = adapter->ptp_pdev;
 
-       switch (cfg.tx_type) {
-       case HWTSTAMP_TX_OFF:
-               adapter->hwts_tx_en = 0;
-               break;
-       case HWTSTAMP_TX_ON:
-               adapter->hwts_tx_en = 1;
-               break;
-       default:
+       if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
                return -ERANGE;
-       }
 
        switch (cfg.rx_filter) {
        case HWTSTAMP_FILTER_NONE:
@@ -284,6 +276,8 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
                return -ERANGE;
        }
 
+       adapter->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
+
        /* Clear out any old time stamps. */
        pch_ch_event_write(pdev, TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED);