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authorPaolo Abeni <pabeni@redhat.com>2016-09-30 16:56:45 +0200
committerDavid S. Miller <davem@davemloft.net>2016-10-03 01:29:57 -0400
commit63d75463c91a5b5be7c0aca11ceb45ea5a0ae81d (patch)
tree57c39b309be4ed7e304e956d3fb0035d2a291e00 /drivers/net/ethernet
parentb82d44d78480faff7456e9e0999acb9d38666057 (diff)
downloadlinux-stericsson-63d75463c91a5b5be7c0aca11ceb45ea5a0ae81d.tar.gz
net: pktgen: fix pkt_size
The commit 879c7220e828 ("net: pktgen: Observe needed_headroom of the device") increased the 'pkt_overhead' field value by LL_RESERVED_SPACE. As a side effect the generated packet size, computed as: /* Eth + IPh + UDPh + mpls */ datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - pkt_dev->pkt_overhead; is decreased by the same value. The above changed slightly the behavior of existing pktgen users, and made the procfs interface somewhat inconsistent. Fix it by restoring the previous pkt_overhead value and using LL_RESERVED_SPACE as extralen in skb allocation. Also, change pktgen_alloc_skb() to only partially reserve the headroom to allow the caller to prefetch from ll header start. v1 -> v2: - fixed some typos in the comments Fixes: 879c7220e828 ("net: pktgen: Observe needed_headroom of the device") Suggested-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
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