[Bug 1125611] Re: DKMS brcompat module circular dependency causes broken module

[James Page]

Fix uploaded to precise-proposed for SRU team review.

I've also uploaded the same fix to https://launchpad.net/~james-
page/+archive/openvswitch

** Description changed:

- On Ubuntu 12.04.2 LTS, after an automatic upgrade from openvswitch
- 1.4.0-1ubuntu1.3 to openvswith 1.4.0-1ubuntu1.4 the brcompat support
- does not work any longer.
+ [Impact]
+ brcompat module is broken
+ 
+ [Test Case]
+ sudo apt-get install openvswitch-datapath-dkms
+ sudo apt-get install openvswitch-brcompat
+ brcompat daemon will fail to start
+ /var/log/syslog: brcompat: module license 'unspecified' taints kernel.
+ 
+ [Regression Potential]
+ Minimal; the additional cherry picked patch renames the brcompat.c file brcompat_main.c to avoid a circular dependency during DKMS build.
+ 
+ [Original bug report]
+ On Ubuntu 12.04.2 LTS, after an automatic upgrade from openvswitch 1.4.0-1ubuntu1.3 to openvswith 1.4.0-1ubuntu1.4 the brcompat support does not work any longer.
  
  The brcompat kernel module can be build, installed, and loaded, but
  openvswitch-brcompatd will not start with the error message: "ovs-
  brcompatd: could not open brcompat socket. Check "brcompat" kernel
  module."
  
  After a downgrade back to version 1.4.0-1ubuntu1.3 brcompat works again.
  I think this is essentially the same problem as described here:
  https://answers.launchpad.net/ubuntu/+source/openvswitch/+question/221334
  
  It might be unrelated, but after the upgrade "lsmod" does not list the
  "openvswitch" module as a dependency of the "brcompat" module. After
  downgrading, the dependency is shown again.

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https://bugs.launchpad.net/bugs/1125611

Title:
  DKMS brcompat module circular dependency causes broken module

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