sr9700: use skb_cow_head() to deal with cloned skbs
authorEric Dumazet <edumazet@google.com>
Wed, 19 Apr 2017 16:59:23 +0000 (09:59 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 21 Apr 2017 17:24:05 +0000 (13:24 -0400)
commitd532c1082f68176363ed766d09bf187616e282fe
treedafe565d6dad6ad3735fd3573519911d2b996716
parenta9e840a2081ed28c2b7caa6a9a0041c950b3c37d
sr9700: 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: c9b37458e956 ("USB2NET : SR9700 : One chip USB 1.1 USB2NET SR9700Device Driver Support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/usb/sr9700.c