bnx2x: No LRO without Rx checksum

No LRO without Rx checksum
Disabling LRO when Rx checksum is disabled

Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 6fe1972..d29f227 100644 (file)
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -8272,33 +8272,6 @@ static int bnx2x_set_coalesce(struct net_device *dev,
        return 0;
 }
 
-static int bnx2x_set_flags(struct net_device *dev, u32 data)
-{
-       struct bnx2x *bp = netdev_priv(dev);
-       int changed = 0;
-       int rc = 0;
-
-       if (data & ETH_FLAG_LRO) {
-               if (!(dev->features & NETIF_F_LRO)) {
-                       dev->features |= NETIF_F_LRO;
-                       bp->flags |= TPA_ENABLE_FLAG;
-                       changed = 1;
-               }
-
-       } else if (dev->features & NETIF_F_LRO) {
-               dev->features &= ~NETIF_F_LRO;
-               bp->flags &= ~TPA_ENABLE_FLAG;
-               changed = 1;
-       }
-
-       if (changed && netif_running(dev)) {
-               bnx2x_nic_unload(bp, UNLOAD_NORMAL);
-               rc = bnx2x_nic_load(bp, LOAD_NORMAL);
-       }
-
-       return rc;
-}
-
 static void bnx2x_get_ringparam(struct net_device *dev,
                                struct ethtool_ringparam *ering)
 {
@@ -8400,6 +8373,34 @@ static int bnx2x_set_pauseparam(struct net_device *dev,
        return 0;
 }
 
+static int bnx2x_set_flags(struct net_device *dev, u32 data)
+{
+       struct bnx2x *bp = netdev_priv(dev);
+       int changed = 0;
+       int rc = 0;
+
+       /* TPA requires Rx CSUM offloading */
+       if ((data & ETH_FLAG_LRO) && bp->rx_csum) {
+               if (!(dev->features & NETIF_F_LRO)) {
+                       dev->features |= NETIF_F_LRO;
+                       bp->flags |= TPA_ENABLE_FLAG;
+                       changed = 1;
+               }
+
+       } else if (dev->features & NETIF_F_LRO) {
+               dev->features &= ~NETIF_F_LRO;
+               bp->flags &= ~TPA_ENABLE_FLAG;
+               changed = 1;
+       }
+
+       if (changed && netif_running(dev)) {
+               bnx2x_nic_unload(bp, UNLOAD_NORMAL);
+               rc = bnx2x_nic_load(bp, LOAD_NORMAL);
+       }
+
+       return rc;
+}
+
 static u32 bnx2x_get_rx_csum(struct net_device *dev)
 {
        struct bnx2x *bp = netdev_priv(dev);
@@ -8410,9 +8411,19 @@ static u32 bnx2x_get_rx_csum(struct net_device *dev)
 static int bnx2x_set_rx_csum(struct net_device *dev, u32 data)
 {
        struct bnx2x *bp = netdev_priv(dev);
+       int rc = 0;
 
        bp->rx_csum = data;
-       return 0;
+
+       /* Disable TPA, when Rx CSUM is disabled. Otherwise all
+          TPA'ed packets will be discarded due to wrong TCP CSUM */
+       if (!data) {
+               u32 flags = ethtool_op_get_flags(dev);
+
+               rc = bnx2x_set_flags(dev, (flags & ~ETH_FLAG_LRO));
+       }
+
+       return rc;
 }
 
 static int bnx2x_set_tso(struct net_device *dev, u32 data)