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Date: Fri, 25 Jun 2010 14:12:40 +0800 From: Shihping <c64683@...il.com> To: linux kernel mail <linux-kernel@...r.kernel.org> Subject: [KERNEL-2.6.34] load dmatest got "__dma_request_channel (fail)" dmesg 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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