netdev - Re: ixp4xx eth broken in 3.7.0/3.8-rc5?

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Message-ID: <m3622duifl.fsf@intrepid.localdomain>
Date:	Thu, 31 Jan 2013 22:54:54 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Mikael Pettersson <mikpe@...uu.se>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Imre Kaloz <kaloz@...nwrt.org>, Xi Wang <xi.wang@...il.com>,
	netdev@...r.kernel.org
Subject: Re: ixp4xx eth broken in 3.7.0/3.8-rc5?

Mikael Pettersson <mikpe@...uu.se> writes:

>  > When I try to update my ixp4xx machine to a 3.8-rc5 kernel it boots
>  > Ok but the network (CONFIG_IXP4XX_ETH=y) fails to come up, with the
>  > following in the kernel log:
>  >
>  > net eth0: coherent DMA mask is unset
>
> A git bisect identified the following as the culprit:
>
>  > From 1a4901177574083c35fafc24c4d151c2a7c7647c Mon Sep 17 00:00:00 2001
>  > From: Xi Wang <xi.wang@...il.com>
>  > Date: Sat, 17 Nov 2012 20:25:09 +0000
>  > Subject: [PATCH] ixp4xx_eth: avoid calling dma_pool_create() with NULL dev
>  >
>  > Use &port->netdev->dev instead of NULL since dma_pool_create() doesn't
>  > allow NULL dev.

IIRC NULL dev in dma_pool_create() meant the usual IXP4xx mask (64MB)
was used. Perhaps devices don't get a mask by default anymore. I will
look at this in few days.
-- 
Krzysztof Halasa
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