linux-kernel - Re: [PATCH v7 07/15] swiotlb: Update is_swiotlb

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Date:   Thu, 27 May 2021 15:28:22 +0200
From:   Christoph Hellwig <hch@....de>
To:     Claire Chang <tientzu@...omium.org>
Cc:     Rob Herring <robh+dt@...nel.org>, mpe@...erman.id.au,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
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Subject: Re: [PATCH v7 07/15] swiotlb: Update is_swiotlb_active to add a
 struct device argument

> +	if (is_swiotlb_active(NULL)) {

Passing a NULL argument to this doesn't make sense.  They all should have
a struct device at hand, you'll just need to dig for it.

And this function should be about to go away anyway, but until then we
need to do this properly.