ixp4xx eth broken in 3.7.0/3.8-rc5?
khc at pm.waw.pl
Sun Feb 10 14:06:36 EST 2013
Mikael Pettersson <mikpe at it.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
> With a 3.7.0 kernel the situation is similar, except that the "net
> eth0: coherent DMA mask is unset" message repeats itself endlessly
> and I can't even get in on the serial console.
> With the 3.6.0 kernel everything works perfectly.
I haven't yet tried the Ethernet driver but it seems my IXP425 box
doesn't like this while mounting a disk (PCI CS3356-based IDE CF card).
Author: Marek Szyprowski <m.szyprowski at samsung.com>
Date: Mon Jul 30 09:11:33 2012 +0200
ARM: dma-mapping: remove custom consistent dma region
This patch changes dma-mapping subsystem to use generic vmalloc areas
for all consistent dma allocations. This increases the total size limit
of the consistent allocations and removes platform hacks and a lot of
Atomic allocations are served from special pool preallocated on boot,
because vmalloc areas cannot be reliably created in atomic context.
This is post-3.5, pre-3.6. Could be a bug in some (not yet upstream)
support code, checking. I wouldn't even mention this except for it
touches this same coherent alloc thing.
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