From: Octavian Purdila <redacted>
Date: Wed, 18 Jun 2008 19:07:16 +0300

    tcp: fix for splice receive when used with software LRO
    
    If an skb has nr_frags set to zero but its frag_list is not empty (as
    it can happen if software LRO is enabled), and a previous
    tcp_read_sock has consumed the linear part of the skb, then
    __skb_splice_bits:
    
    (a) incorrectly reports an error and
    
    (b) forgets to update the offset to account for the linear part
    
    Any of the two problems will cause the subsequent __skb_splice_bits
    call (the one that handles the frag_list skbs) to either skip data,
    or, if the unadjusted offset is greater then the size of the next skb
    in the frag_list, make tcp_splice_read loop forever.
    
    Signed-off-by: Octavian Purdila [off-list ref]

Applied, th anks Octavian.