Re: [PATCH] dmaengine/dw_dmac: Reconfigure interrupt and chan_cfgregister on resume

[Viresh Kumar]

On 11/23/2011 4:19 PM, Vinod Koul wrote:
> then why not perform save and restore in your suspend and restore
> callbacks. That way you don't pay penalty of doing that in every alloc
> as you seem to be doing now?

Not actually. I am not saving anything to be restored after suspend.
There are few things (configuring CFG regs and enabling interrupts),
which are done earlier on alloc_channels. As this will not be called after
resume, so we need to set them again.

What i have done is, removed all this stuff from alloc channels and moved it
to dwc_dostart(). Here, i am checking if channel is already programmed or not.
If not (Can happen only in two cases: On resume and other on fresh channel alloc),
i configure them. So there is no save/restore actually done.

-- 
viresh
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