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authorSimon Graham <simon.graham@citrix.com>2012-05-24 06:26:07 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-24 16:22:53 -0400
commite26b203ede31fffd52571a5ba607a26c79dc5c0d (patch)
treed9eadc591e5a562122900058cc1e90ef430e1855 /net/wanrouter
parentb4bd8ad9bb311e8536f726f7a633620ccd358cde (diff)
downloadlinux-e26b203ede31fffd52571a5ba607a26c79dc5c0d.tar.bz2
xen/netback: Calculate the number of SKB slots required correctly
When calculating the number of slots required for a packet header, the code was reserving too many slots if the header crossed a page boundary. Since netbk_gop_skb copies the header to the start of the page, the count of slots required for the header should be based solely on the header size. This problem is easy to reproduce if a VIF is bridged to a USB 3G modem device as the skb->data value always starts near the end of the first page. Signed-off-by: Simon Graham <simon.graham@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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