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

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Message-ID: <20180525163532.GA13399@kroah.com>
Date:   Fri, 25 May 2018 18:35:32 +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 06:23:07PM +0200, Christoph Hellwig wrote:
> On Fri, May 25, 2018 at 04:50:12PM +0200, Greg Kroah-Hartman wrote:
> > 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.
> 
> Should be "once we get around it", which in proper grammar should
> probably be "once we get to it".  Anyway, the point is that right
> now struct device is bloated with a lot of fields for dma/iommu
> purposes and we need to clean this up.  It's been on my TODO list
> for a while.

Ah, makes sense, that's fine with me, I'd love to see that get cleaned
up.

thanks,

greg k-h