commit 6046136c742e32d5e6431cdcd8957638d1816821
author Eli Cohen <eli@dev.mellanox.co.il> Wed Apr 16 21:01:10 2008 -0700
committer Roland Dreier <rolandd@cisco.com> Wed Apr 16 21:01:10 2008 -0700
tree 512a0165e982e5bdf93ba0732c4a52b01c84317b
parent 3371836383d63b627b228875f5ac63023cbf11d2

IPoIB: Use checksum offload support if available

For HCAs that support checksum offload (ie that set IB_DEVICE_UD_IP_CSUM
in the device capabilities flags), have IPoIB set NETIF_F_IP_CSUM and
use the HCA to generate and verify IP checksums.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/ipoib/ipoib_cm.c

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 2490b2d..edf63dc 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1383,6 +1383,10 @@
 		set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
 		ipoib_warn(priv, "enabling connected mode "
 			   "will cause multicast packet drops\n");
+
+		dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG);
+		priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
+
 		ipoib_flush_paths(dev);
 		return count;
 	}
@@ -1391,6 +1395,10 @@
 		clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
 		dev->mtu = min(priv->mcast_mtu, dev->mtu);
 		ipoib_flush_paths(dev);
+
+		if (test_bit(IPOIB_FLAG_CSUM, &priv->flags))
+			dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
+
 		return count;
 	}