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Date:   Wed, 7 Jan 2015 12:12:55 +0100
From:   Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
To:     Alan Stern <stern@rowland.harvard.edu>
CC:     Greg KH <greg@kroah.com>, David Daney <david.daney@cavium.com>,
        Alex Smith <alex.smith@imgtec.com>,
        Linux-MIPS <linux-mips@linux-mips.org>,
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        Aaro Koskinen <aaro.koskinen@iki.fi>
Subject: Re: [PATCH 2/2 resend v2] USB: host: Introduce flag to enable use of
 64-bit dma_mask for ehci-platform
Message-ID: <20150107111255.GH4194@alberich>
References: <20150106125015.GC4194@alberich>
 <Pine.LNX.4.44L0.1501061048230.1602-100000@iolanthe.rowland.org>
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On Tue, Jan 06, 2015 at 10:49:40AM -0500, Alan Stern wrote:
> On Tue, 6 Jan 2015, Andreas Herrmann wrote:
> 
> > ehci-octeon driver used a 64-bit dma_mask. With removal of ehci-octeon
> > and usage of ehci-platform ehci dma_mask is now limited to 32 bits
> > (coerced in ehci_platform_probe).
> > 
> > Provide a flag in ehci platform data to allow use of 64 bits for
> > dma_mask.
> > 
> > Cc: David Daney <david.daney@cavium.com>
> > Cc: Alex Smith <alex.smith@imgtec.com>
> > Cc: Alan Stern <stern@rowland.harvard.edu>
> > Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
> > Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
> 
> Acked-by: Alan Stern <stern@rowland.harvard.edu>
> 
> Is something like this also needed for ohci-platform?

No, I don't think so.

> Or are all OHCI implementations restricted to 32-bit DMA masks?

AFAIK OHCI supports only 32-bit memory addressing.


> Alan Stern

Andreas