Bug#651215: Kernel fails to boot on NSLU2

On Tue, 2011-12-06 at 20:40 +0100, Jochen Friedrich wrote:

Package: linux-image-3.1.0-1-ixp4xx
Severity: normal

While 3.0.0-6 booted OK on NSLU2 platform, 3.1.0-1 or -4 fails to do so.

Boot log:

[...]

[    0.000000] Linux version 3.1.0-1-ixp4xx (Debian 3.1.4-1) (waldi at debian.org)
(gcc version 4.6.2 (Debian 4.6.2-4) ) #1 Wed Nov 30 06:35:38 UTC 2011
[    0.000000] CPU: XScale-IXP42x Family [690541f1] revision 1 (ARMv5TE),
cr=0000397f
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine: Linksys NSLU2

[...]

[    3.269860] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    3.350596] PCI: enabling device 0000:00:01.2 (0140 -> 0142)
[    3.356553] ehci_hcd 0000:00:01.2: EHCI Host Controller
[    3.452053] ehci_hcd 0000:00:01.2: new USB bus registered, assigned bus
number 1
[    3.459646] ehci_hcd 0000:00:01.2: coherent DMA mask 0x3ffffff is smaller
than system GFP_DMA mask 0xffffffff
[    3.570085] ehci_hcd 0000:00:01.2: coherent DMA mask 0x3ffffff is smaller
than system GFP_DMA mask 0xffffffff
[    3.680189] ehci_hcd 0000:00:01.2: coherent DMA mask 0x3ffffff is smaller
than system GFP_DMA mask 0xffffffff
(repeated over and over)

I assume that this has something to do with:

commit 650320181a08b64d4421c65c639cf47ad8cc2cd6
Author: Nicolas Pitre [off-list ref]
Date:   Mon Jul 18 15:05:10 2011 -0400

    ARM: change ARM_DMA_ZONE_SIZE into a variable

commit 7553ee777b513c3bc8f45bb9fc75fb1bbc584ba1
Author: Nicolas Pitre [off-list ref]
Date:   Tue Jul 5 22:28:09 2011 -0400

    ARM: mach-ixp4xx: move from ARM_DMA_ZONE_SIZE to mdesc->dma_zone_size

It's clear that the DMA zone size is supposed to be 64 MB on this
machine and I don't see why the DMA mask hasn't propagated correctly.
Any idea, Nicholas?

Ben.

-- 
Ben Hutchings
Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer
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