Re: dmaengine: Can we schedule new transfer from dma callbackroutine??

From: Russell King - ARM Linux
Date: Fri Apr 15 2011 - 05:15:55 EST

On Fri, Apr 15, 2011 at 12:15:43PM +0530, viresh kumar wrote:
> There is one more issue in the current DW_DMAC driver.
> As most of interrupt processing is done in tasklet, spin_lock_bh() is used
> in almost every routine.

As you can't use spin_lock_bh() from IRQ context (you'll get a lockdep
warning) these need to be converted to being the irqsave versions.
That's probably the easiest fix.
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