linux-kernel - Re: [PATCH 1/7] core, dma-direct: add a flag 32-bit dma limits

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Message-ID: <20180525145012.GA3863@kroah.com>
Date:   Fri, 25 May 2018 16:50:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>, x86@...nel.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux-ia64@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/7] core, dma-direct: add a flag 32-bit dma limits

On Fri, May 25, 2018 at 04:35:06PM +0200, Christoph Hellwig wrote:
> Various PCI bridges (VIA PCI, Xilinx PCIe) limit DMA to only 32-bits
> even if the device itself supports more.  Add a single bit flag to
> struct device (to be moved into the dma extension once we around it)

"once we around it"?  I don't understand, sorry.

> to flag such devices and reject larger DMA to them.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  include/linux/device.h | 3 +++
>  lib/dma-direct.c       | 6 ++++++
>  2 files changed, 9 insertions(+)

For the patch, no objection from me:

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>