From: Seth Forshee <seth.forshee@canonical.com>
Date: Wed, 26 Nov 2014 02:28:24 +0000 (-0600)
Subject: xen-netfront: Remove BUGs on paged skb data which crosses a page boundary
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~45^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d609725d4357f499e2103e46011308b32f53513;p=pandora-kernel.git

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>
---

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