vmxnet3: Provide required number of bytes in first SG buffer
This is a performance enhancement fix. vmxnet3 device performs better when provided with at least 54 bytes (ethernet 14 + IP 20+ TCP 20) in the first SG buffer. For UDP packets driver provides lesser than that in first sg. This change fixes the same. Also avoid the redundant pskb_may_pull() call. Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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