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Date:   Fri, 18 Sep 2020 07:10:30 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc:     Christoph Hellwig <hch@lst.de>,
        Aaro Koskinen <aaro.koskinen@iki.fi>,
        Tony Lindgren <tony@atomide.com>,
        Robin Murphy <robin.murphy@arm.com>,
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        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-omap@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [PATCH 3/4] ARM/dma-mapping: don't handle NULL devices in
 dma-direct.h
Message-ID: <20200918051030.GA21261@lst.de>
References: <20200917173229.3311382-1-hch@lst.de> <20200917173229.3311382-4-hch@lst.de> <20200917185009.GB1559@shell.armlinux.org.uk>
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On Thu, Sep 17, 2020 at 07:50:10PM +0100, Russell King - ARM Linux admin wrote:
> On Thu, Sep 17, 2020 at 07:32:28PM +0200, Christoph Hellwig wrote:
> > The DMA API removed support for not passing in a device a long time
> > ago, so remove the NULL checks.
> 
> What happens with ISA devices?

For actual drivers they've been switched to struct isa_driver, which
provides a struct device.  For some of the special case like the
arch/arm/kernel/dma-isa.c we now use static struct device instances.