tree 8c3d8abb51f9a938a28f781bcbe4621be0ebf567
parent 95b9b88d2da5e43e025400afcb492643933bf858
author Eric Dumazet <edumazet@google.com> 1492621161 -0700
committer David S. Miller <davem@davemloft.net> 1492795444 -0400

smsc75xx: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: d0cad871703b ("smsc75xx: SMSC LAN75xx USB gigabit ethernet adapter driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>