netdev - Re: [PATCH net-next 04/15] net: mlx5: Replace in

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Message-ID: <20201031095938.3878412e@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Sat, 31 Oct 2020 09:59:38 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Leon Romanovsky <leon@...nel.org>,
        Saeed Mahameed <saeedm@...dia.com>
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        netdev@...r.kernel.org, Aymen Sghaier <aymen.sghaier@....com>,
        Daniel Drake <dsd@...too.org>,
        "David S. Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Horia Geantă <horia.geanta@....com>,
        Jon Mason <jdmason@...zu.us>, Jouni Malinen <j@...fi>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-rdma@...r.kernel.org,
        linux-wireless@...r.kernel.org, Li Yang <leoyang.li@....com>,
        Madalin Bucur <madalin.bucur@....com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Rain River <rain.1986.08.12@...il.com>,
        Samuel Chessman <chessman@....org>,
        Ulrich Kunitz <kune@...ne-taler.de>,
        Zhu Yanjun <zyjzyj2000@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH net-next 04/15] net: mlx5: Replace in_irq() usage.

On Tue, 27 Oct 2020 23:54:43 +0100 Sebastian Andrzej Siewior wrote:
> mlx5_eq_async_int() uses in_irq() to decide whether eq::lock needs to be
> acquired and released with spin_[un]lock() or the irq saving/restoring
> variants.
> 
> The usage of in_*() in drivers is phased out and Linus clearly requested
> that code which changes behaviour depending on context should either be
> seperated or the context be conveyed in an argument passed by the caller,
> which usually knows the context.
> 
> mlx5_eq_async_int() knows the context via the action argument already so
> using it for the lock variant decision is a straight forward replacement
> for in_irq().
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Cc: Saeed Mahameed <saeedm@...dia.com>
> Cc: Leon Romanovsky <leon@...nel.org>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: linux-rdma@...r.kernel.org

Saeed, please pick this up into your tree.