Merge tag 'for-7.0-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...

Pull btrfs fix from David Sterba:
 "One more fix for a potential extent tree corruption due to an
  unexpected error value.

  When the search for an extent item failed, it under some circumstances
  was reported as a success to the caller"

* tag 'for-7.0-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix incorrect return value after changing leaf in lookup_extent_data_ref()