igb/igbvf: set rx csum always enabled in hw, disable via sw

An issue was found in which rx checksum could not be enabled without
resetting the interface.  The issue was the hardware enable was not being
done via ethtool.  To resolve this issue and prevent conflicts with VF
configuration we will leave the feature always enabled in hardware, and
then in software we will choose to ignore the results via a sw flag.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index bca7e9f76be4..8de8629b07ec 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1395,8 +1395,6 @@ static int __devinit igb_probe(struct pci_dev *pdev,
 
         igb_validate_mdi_setting(hw);
 
-        adapter->rx_csum = 1;
-
         /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
          * enable the ACPI Magic Packet filter
          */
@@ -2249,13 +2247,12 @@ static void igb_configure_rx(struct igb_adapter *adapter)
         rxcsum = rd32(E1000_RXCSUM);
         /* Disable raw packet checksumming */
         rxcsum |= E1000_RXCSUM_PCSD;
-        /* Don't need to set TUOFL or IPOFL, they default to 1 */
-        if (!adapter->rx_csum)
-                rxcsum &= ~(E1000_RXCSUM_TUOFL | E1000_RXCSUM_IPOFL);
-        else if (adapter->hw.mac.type == e1000_82576)
+
+        if (adapter->hw.mac.type == e1000_82576)
                 /* Enable Receive Checksum Offload for SCTP */
                 rxcsum |= E1000_RXCSUM_CRCOFL;
 
+        /* Don't need to set TUOFL or IPOFL, they default to 1 */
         wr32(E1000_RXCSUM, rxcsum);
 
         /* Set the default pool for the PF's first queue */
@@ -4455,7 +4452,8 @@ static inline void igb_rx_checksum_adv(struct igb_adapter *adapter,
         skb->ip_summed = CHECKSUM_NONE;
 
         /* Ignore Checksum bit is set or checksum is disabled through ethtool */
-        if ((status_err & E1000_RXD_STAT_IXSM) || !adapter->rx_csum)
+        if ((status_err & E1000_RXD_STAT_IXSM) ||
+            (adapter->flags & IGB_FLAG_RX_CSUM_DISABLED))
                 return;
         /* TCP/UDP checksum error bit is set */
         if (status_err &