Re: [PATCH] drivers: misc: stcam: Renesas stcam device

From: Greg Kroah-Hartman
Date: Wed Oct 30 2013 - 17:22:57 EST

On Wed, Oct 30, 2013 at 12:50:16PM -0700, Daniel Walker wrote:
> On Wed, Oct 30, 2013 at 12:42:06PM -0700, Greg Kroah-Hartman wrote:
> > On Wed, Oct 30, 2013 at 12:17:48PM -0700, Daniel Walker wrote:
> > > This is a driver for the ternary content addressable memory unit from Renesas. It
> > > allows filtering on bits, and wildcards thru the chip.
> > >
> > > Signed-off-by: Daniel Walker <dwalker@xxxxxxxxxx>
> >
> > What about the Cisco copyright? Has that author signed off on this?
> He's not aware of the release .. I can ask him to sign off, but I think
> it's academic (he doesn't care).. I don't think he knows what a sign off
> means.

You should at least ask, it's only nice to do so.

> > And why a separate driver, can't you do this all from userspace as a
> > normal i2c driver?
> I don't know , can I ? This is what Cisco is currently using ..

That doesn't mean anything, sorry. We don't want to duplicate stuff
that can already be done using i2c-dev and the like, right?

> > and most important, what is a "ternary content addressable memory unit"
> > and what would you do with such a thing?
> I asked the same question when I looked at the driver. It's in
> wikipedia,
> It used for filtering things by 0,1 or wildcard.. In Cisco case "things"
> is packets.

That still doesn't explain what this driver is used for to me, sorry.
Care to explain?


greg k-h
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