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

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Message-ID: <20190507090550.GA16148@fuggles.cambridge.arm.com>
Date:   Tue, 7 May 2019 10:05:50 +0100
From:   Will Deacon <will.deacon@....com>
To:     Christoph Hellwig <hch@....de>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        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, May 07, 2019 at 08:37:20AM +0200, Christoph Hellwig wrote:
> On Fri, May 03, 2019 at 12:33:53PM +0100, Catalin Marinas wrote:
> > 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>
> 
> Given that this is a bug fix mostly separate from the rest of the
> series - do you want to pick it up for 5.2 and maybe add a Cc for
> stable?

Sure thing; I'll probably send it after -rc1 unless we get some other fixes
in during the merge window.

Will