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RE: [PATCH 18/25] iwlagn: warn about nested SYNC commands

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Aggreed again :-)

Thanks,
       Emmanuel


> -----Original Message-----
> From: Johannes Berg [mailto:johannes@xxxxxxxxxxxxxxxx]
> Sent: Monday, June 27, 2011 11:43 AM
> To: Guy, Wey-Yi W
> Cc: linville@xxxxxxxxxxxxx; linux-wireless@xxxxxxxxxxxxxxx; Grumbach,
> Emmanuel
> Subject: Re: [PATCH 18/25] iwlagn: warn about nested SYNC commands
> 
> On Mon, 2011-06-27 at 10:40 +0200, Johannes Berg wrote:
> > On Sat, 2011-06-18 at 08:34 -0700, Wey-Yi Guy wrote:
> > > From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
> > >
> > > Since there is no protection around SYNC host command mechanism, at
> least WARN
> > > when collision happens between two SYNC host comamnds. I am not sure
> there is a
> > > real  issue (beyond the HCMD_ACTIVE flag maintenance) with having two
> SYNC host
> > > commands at the same time, but at least now, we will know about it.
> >
> > Please drop this particular patch. We discussed this but then forgot
> > about it -- this patch only warns when collisions actually happen, but
> > we can use lockdep to warn when collisions _could_ happen as well.
> 
> Oops, n/m, I see it's already in. Will submit a follow-up that puts
> better code in place instead.
> 
> johannes

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