Re: [PATCH v3] dmaengine: rcar-dmac: don't use DMAC error interrupt
From: Kuninori Morimoto
Date: Fri Jun 15 2018 - 03:15:49 EST
> > rcar-dmac has 2 types of interrupt, 1) error IRQ (for all),
> > 2) IRQ for each channels.
> > If error happens on some channels, the error IRQ will be handled
> > by 1), and "all" channels will be restarted.
> > But in this design, error handling itself will be problem for
> > non error channel users.
> > This patch removes 1) handler, and handles error IRQ on 2)
> Thank you, that explains the rationale!
> BTW, how can you trigger an error, for testing?
We created local patch to break address alignment.