On Tue, 12 Jan 2010 20:16:11 +0100
Jarek Poplawski [off-list ref] wrote:

quoted

What is supposed to happen:
  * restart sky2_restart calls napi_disable while cleaning  

Yes, but it's after the detach; similarly to sky2_suspend().
(I'm not sure how safe vs such re-enabling is sky2_set_ringparam().

set_ringparam happens under rtnl_lock() so reset and ringparams can't
conflict.

quoted

  * dev_close we can't call napi_disable() because of two ports
    sharing same NAPI, so napi_synchronize() is used to make sure that
    any NAPI running on other CPU has completed.  

So it seems still endangered.

It was but not in revised v2 patch.