Re: [PATCH 07/13] dmaengine: introduce dma_request_channel and privatechannels

From: Nicolas Ferre
Date: Tue Dec 02 2008 - 12:27:20 EST

Guennadi Liakhovetski :
Another problem I encountered with my framebuffer is the initialisation order. You initialise dmaengine per subsys_initcall(), whereas the only way to guarantee the order:

dma-device driver

when they are all linked into the kernel was to switch dmaengine to arch_initcall, put the dma driver under subsys_initcall, and the framebuffer under a normal module_init / device_initcall.

I did not dig much in this but I feel also that dmaengine is initialized a bit late : it seems to be initialized after atmel-mci is started.
It works but it seems to me that dmaengine has to be initialized very early... 2 cents.

Nicolas Ferre

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