netdev - Re: [PATCH net-next 05/15] net: sgi: ioc3-eth: allocate space for desc rings only once

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Date:   Wed, 28 Aug 2019 15:58:09 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Thomas Bogendoerfer <tbogendoerfer@...e.de>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next 05/15] net: sgi: ioc3-eth: allocate space for
 desc rings only once

On Wed, 28 Aug 2019 16:03:04 +0200, Thomas Bogendoerfer wrote:
> Memory for descriptor rings are allocated/freed, when interface is
> brought up/down. Since the size of the rings is not changeable by
> hardware, we now allocate rings now during probe and free it, when
> device is removed.
> 
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>

So the rings still get freed and allocated from ioc3_init()
but there's a set allocated from the start? I guess that makes 
some sense..

Most drivers will allocate rings in open() and free them in close().