netdev - Re: [RFC PATCH v2 net-next 00/15] tc-taprio offload for SJA1105 DSA

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Message-ID: <20190829182132.43001706@cakuba.netronome.com>
Date:   Thu, 29 Aug 2019 18:21:32 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     f.fainelli@...il.com, vivien.didelot@...il.com, andrew@...n.ch,
        davem@...emloft.net, vinicius.gomes@...el.com,
        vedang.patel@...el.com, richardcochran@...il.com,
        weifeng.voon@...el.com, jiri@...lanox.com, m-karicheri2@...com,
        Jose.Abreu@...opsys.com, ilias.apalodimas@...aro.org,
        jhs@...atatu.com, xiyou.wangcong@...il.com, netdev@...r.kernel.org
Subject: Re: [RFC PATCH v2 net-next 00/15] tc-taprio offload for SJA1105 DSA

On Fri, 30 Aug 2019 03:46:20 +0300, Vladimir Oltean wrote:
> - Configuring the switch over SPI cannot apparently be done from this
>   ndo_setup_tc callback because it runs in atomic context. I also have
>   some downstream patches to offload tc clsact matchall with mirred
>   action, but in that case it looks like the atomic context restriction
>   does not apply.

This sounds really surprising ndo_setup_tc should always be allowed to
sleep. Can the taprio limitation be lifted somehow?