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RE: [PATCH] iwlegacy: don't mess up the SCD when removing a key

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> 
> On Wed, Jul 04, 2012 at 02:33:48PM +0300, Emmanuel Grumbach wrote:
> > > On Mon, Jul 02, 2012 at 02:31:21PM +0300, Emmanuel Grumbach wrote:
> > > > When we remove a key, we put a key index which was supposed to
> > > > tell the fw that we are actually removing the key. But instead the
> > > > fw took that index as a valid index and messed up the SRAM of the
> > > > device.
> > > >
> > > > This memory corruption on the device mangled the data of the SCD.
> > > > The impact on the user is that SCD queue 2 got stuck after having
> > > > removed keys.
> > > >
> > > > Change-Id: I721f71c1a3a0af6058abe1975cebd9b613c7ff2b
> > > > Signed-off-by: Emmanuel Grumbach
> <emmanuel.grumbach@xxxxxxxxx>
> > > > ---
> > > > Paul, can you please test ?
> > > > If it solve the issues for you, I will send as a patch and Cc
> > > > stable Totally not tested
> > > > v2: first hunk of this patch thanks to Stanislaw's review
> > >
> > > I tested that patch and did not found any problem.
> > >
> >
> > Ok, but doest it solve the bug ?
> 
> CCing Poul.
> 
> But even if not, we still probably need that patch, right? Or is possible that
> 4965 firmware do not corrupt memory when we provide wrong key offset to
> it? Or maybe for 4965 key offset 0xff is something that is expected and
> needed to invalidate the key?
> 

I guess the patch is needed for 4965. This code in fw is quite old and hasn't changed for a while, so...
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