These two followup fixes to the original "put stricter guards on queue dead 
checks" that came recently through stable updates are being reverted as well on 
Lucid tree:
07bdfb8d38a5c9aee4451c10c58302081d47733e - block: add proper state guards to 
__elv_next_request
93b83aacba2a69055ea0fd6984f73824b52f4147 - Fix oops caused by queue refcounting 
failure

** Description changed:

  These patches from upstream caused a regression and are being reverted
  until a complete solution is found.
  
  - Reverted changes on natty (regression tracked on bug 793796):
+ 39a0cfed63b656486fb2feee063aa033816a90e0 - put stricter guards on queue dead 
checks
  57bd324dbd799b271cad945224df5a21b151297b - fix oops in scsi_run_queue()
- 39a0cfed63b656486fb2feee063aa033816a90e0 - put stricter guards on queue dead 
checks
  
  - Reverted changes on lucid (regression tracked on bug 811745):
+ b9143b40c0c8239efdd6af949d90b85a8263716e - put stricter guards on queue dead 
checks
  69155e27412e1de52993d6d7f49e84d967235ee7 - fix oops in scsi_run_queue()
- b9143b40c0c8239efdd6af949d90b85a8263716e - put stricter guards on queue dead 
checks
+ 7bdfb8d38a5c9aee4451c10c58302081d47733e - block: add proper state guards to 
__elv_next_request
+ 93b83aacba2a69055ea0fd6984f73824b52f4147 - Fix oops caused by queue 
refcounting failure

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https://bugs.launchpad.net/bugs/802986

Title:
  Revert upstream scsi run queue changes

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