hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

IB/ipoib: When given an invalid UD MTU, give debug msg 

In datagram mode, the IB UD (Unreliable Datagram) transport is used
so the MTU of the interface is equal to the IB L2 MTU minus the
IPoIB encapsulation header. Any request to change the MTU value
above the maximum range will change the MTU to the max allowed, but
will not show any warning message. An ipoib_warn is issued in such
cases, letting the user know that even though the value is legal,
it can't be currently applied.

Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Feras Daoud 2016-12-28 14:47:20 +02:00 committed by Doug Ledford
parent db287ec5cb
commit 29da686dff
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/ulp/ipoib/ipoib_main.c
View File

@ -229,6 +229,10 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
priv->admin_mtu = new_mtu;
if (priv->mcast_mtu < priv->admin_mtu)
ipoib_dbg(priv, "MTU must be smaller than the underlying "
"link layer MTU - 4 (%u)\n", priv->mcast_mtu);
dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
return 0;