[Xen-changelog] Fix rx buffer allocation in netfront. The final allocation size

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 7f2ccea5a4ec96af72e83c13ee25845e5d2cbb61
# Parent  8b3454b6bf5efdb170b570bcf9558bfc0708265a
Fix rx buffer allocation in netfront. The final allocation size
was ending up bigger than PAGE_SIZE.

Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r 8b3454b6bf5e -r 7f2ccea5a4ec 
linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c
--- a/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c      Tue Dec 13 
00:56:50 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c      Tue Dec 13 
02:47:47 2005
@@ -540,8 +540,8 @@
                 * tailroom then round down to SKB_DATA_ALIGN boundary.
                 */
                skb = alloc_xen_skb(
-                       (PAGE_SIZE - 16 - sizeof(struct skb_shared_info)) &
-                       (-SKB_DATA_ALIGN(1)));
+                       ((PAGE_SIZE - sizeof(struct skb_shared_info)) &
+                        (-SKB_DATA_ALIGN(1))) - 16);
                if (skb == NULL)
                        break;
                __skb_queue_tail(&np->rx_batch, skb);

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