* [KERNEL-2.6.34] load dmatest got "__dma_request_channel (fail)" dmesg
[not found] <AANLkTikUkrAyZiuG_alemWfR6pbcoKrCtL6rG9KBLRzb@mail.gmail.com>
@ 2010-06-25 6:12 ` Shihping
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From: Shihping @ 2010-06-25 6:12 UTC (permalink / raw)
To: linux kernel mail
Hi,
I try to load dmatest module in linux-2.6.34 on Ubuntu x86_64 Server system
but when I loaded dmatest module, I got "__dma_request_channel:fall
((null))" message.
It seems unable to allocate DMA channel.
But I found /proc/dma was registed to cascade mode like
# cat /proc/dma
4:cascade
So I thought DMA channel should be registed by DMA controller in ICH
successfully. right?
My plaform use Intel E5100(San Clemente) and ICH9R chipset,there were
2 DMA controller was embedded in ICH9R chip.
Is dmatest module not work with ICH9R ? or some other reason cause this?
Sorry about my poor English, and thanks for your answers and responses
Shihping Chen
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2010-06-25 6:12 ` [KERNEL-2.6.34] load dmatest got "__dma_request_channel (fail)" dmesg Shihping
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