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Re: if_iwn.c patch to support the 5100... (analysis + patch)

On Thu, Sep 17, 2009 at 09:39:20AM -0600, Sverre Froyen wrote:
> It looks like these errors may be because iwn_init is called a second time 
> before the first call has completed.  It is called via the "if_init" pointer 
> and also through iwn_ioctl.  The call via the ioctl path only happens if the 
> IFF_UP is set.  I notice that, e.g., net/if_ethersubr.c sets this flag before 
> the call to if_init.  While this seems counterintuitive to me it is appears 
> to 
> be the way it's always worked.  The simplest fix is to remove the call to 
> iwn_init from iwn_ioctl:

Doesn't that have the unfortunate side effect of you then being unable
to reset the interface by doing an ifconfig down/up?

If the double init is really the problem then why not serialise access
to the function?

Brett Lymn
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