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Date:   Thu, 27 May 2021 15:28:22 +0200
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Subject: Re: [PATCH v7 07/15] swiotlb: Update is_swiotlb_active to add a
 struct device argument
Message-ID: <20210527132822.GE26160@lst.de>
References: <20210518064215.2856977-1-tientzu@chromium.org> <20210518064215.2856977-8-tientzu@chromium.org>
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> +	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.