linux-kernel - Re: [PATCH v5 5/7] dma-iommu: Check CONFIG

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Date:   Mon, 16 Aug 2021 14:08:36 +0200
From:   Christoph Hellwig <hch@....de>
To:     David Stevens <stevensd@...omium.org>
Cc:     Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Tom Murphy <murphyt7@....ie>, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 5/7] dma-iommu: Check CONFIG_SWIOTLB more broadly

> -	if (IS_ENABLED(CONFIG_SWIOTLB) && dev_is_untrusted(dev) &&
> +	if (IS_ENABLED(CONFIG_SWIOTLB) && dev_use_swiotlb(dev) &&
>  	    iova_offset(iovad, phys | size)) {

This can drop the explicit CONFIG_SWIOTLB check now (and make the remaining
conditional fit onto a single line).