From: David Miller <davem@davemloft.net>
To: khc@pm.waw.pl
Cc: netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, c.aeschlimann@acn-group.ch
Subject: Re: [PATCH] Fix IXP4xx coherent allocations
Date: Sat, 23 Mar 2013 19:57:40 -0400 (EDT) [thread overview]
Message-ID: <20130323.195740.2108147521543354261.davem@davemloft.net> (raw)
In-Reply-To: <m3obe9lxil.fsf@intrepid.localdomain>
From: Krzysztof Halasa <khc@pm.waw.pl>
Date: Sat, 23 Mar 2013 20:35:46 +0100
> ARM core code currently requires coherent DMA mask to be set. Make sure
> we limit PCI devices to 64 MiB while allowing on-chip devices to access
> the whole 4 GiB address space.
>
> This fixes a v3.7+ regression which broke IXP4xx built-in network devices.
>
> Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This requirement is not reasonable.
The DMA API documentation clearly states what the default must be,
and what drivers are guarenteed will be the default.
next prev parent reply other threads:[~2013-03-23 23:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-23 19:35 [PATCH] Fix IXP4xx coherent allocations Krzysztof Halasa
2013-03-23 23:57 ` David Miller [this message]
2013-03-24 19:11 ` Ben Hutchings
2013-03-24 21:15 ` Krzysztof Halasa
2013-03-30 13:29 ` Russell King - ARM Linux
2013-03-30 14:22 ` Krzysztof Halasa
2013-03-30 15:31 ` Russell King - ARM Linux
2013-04-01 20:17 ` Krzysztof Halasa
2013-04-02 0:40 ` Ben Hutchings
2013-03-30 13:18 ` Krzysztof Halasa
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