Re: [PATCH v2] dmaengine: rcar-dmac: don't use DMAC error interrupt
From: Kuninori Morimoto
Date: Thu Jun 14 2018 - 20:35:32 EST
> > > Current rcar-dmac is using DMAC error interrupt which will handle all
> > > channel's error. But in this design, error handling itself will be
> > > issue if user want to use virtualization, multi OS, etc.
> > > This patch removes current DMAC error interrupt handling, and handle it
> > > on each channel interrupt handler.
> > Just wondering, what's the usage pattern where this causes a problem?
> > Do you plan to export part of a SYS-DMAC instance to a guest?
> "virtualization, multi OS" part is maybe misleading.
> It will be problem on non virtualization, too.
> > How to maintain host/guest isolation?
> This is another topic/issue, I think
I will post v3 patch, soon