tree f7a4035a4042165fb0fd9ced5d86ab9e350e6560
parent 7fa2955ff70ce4532f144d26b8a087095f9c9ffc
author Seth Forshee <seth.forshee@canonical.com> 1416968904 -0600
committer David S. Miller <davem@davemloft.net> 1417577053 -0800

xen-netfront: Remove BUGs on paged skb data which crosses a page boundary

These BUGs can be erroneously triggered by frags which refer to
tail pages within a compound page. The data in these pages may
overrun the hardware page while still being contained within the
compound page, but since compound_order() evaluates to 0 for tail
pages the assertion fails. The code already iterates through
subsequent pages correctly in this scenario, so the BUGs are
unnecessary and can be removed.

Fixes: f36c374782e4 ("xen/netfront: handle compound page fragments on transmit")
Cc: <stable@vger.kernel.org> # 3.7+
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>