linux-kernel - Re: [PATCH 01/25] arm64/iommu: handle non-remapped addresses in ->mmap and ->get

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Message-ID: <20190503113352.GA55449@arrakis.emea.arm.com>
Date:   Fri, 3 May 2019 12:33:53 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Christoph Hellwig <hch@....de>
Cc:     Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Will Deacon <will.deacon@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/25] arm64/iommu: handle non-remapped addresses in
 ->mmap and ->get_sgtable

On Tue, Apr 30, 2019 at 06:51:50AM -0400, Christoph Hellwig wrote:
> DMA allocations that can't sleep may return non-remapped addresses, but
> we do not properly handle them in the mmap and get_sgtable methods.
> Resolve non-vmalloc addresses using virt_to_page to handle this corner
> case.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> Reviewed-by: Robin Murphy <robin.murphy@....com>

Acked-by: Catalin Marinas <catalin.marinas@....com>