Cleanup tcp_try_coalesce, fix module lockup on ixgbe

This set represents the original patch I had done for trying to cleanup tcp_try_coalesce broken into 3 patches. The first one illustrates how I believe we should be updating the truesize based on either the size of sk_buff in the case of head reuse, or sk_buff plus the size of the head in the case of a headlen of 0.

The other two patches go through and reorder things so there isn't as much need for gotos. I believe it makes the code much more readable since it starts at the top and finishes at the bottom instead of looping through the entire code path a few times.

The last patch addresses an issue I ran into on ixgbe. It turns out the recent HWMON patch added a but on 82598 adapters that caused the driver to get hung in module unload. I figured I would submit it directly since it is a small change to fix an issue that could have a larger impact.

On that note I am going to sleep now and will respond to any reviews and/or comments in the morning.

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Alexander Duyck (4):
ixgbe: Fix use after free on module remove
tcp: move stats merge to the end of tcp_try_coalesce
tcp: Move code related to head frag in tcp_try_coalesce
tcp: Fix truesize accounting in tcp_try_coalesce

 drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c |    4 +
 net/ipv4/tcp_input.c                           |   83 +++++++++++++-----------
 2 files changed, 49 insertions(+), 38 deletions(-)

Thanks,

Alex