Re: [PATCH] dmaengine: rcar-dmac: don't use DMAC error interrupt
From: Kuninori Morimoto
Date: Tue Jun 12 2018 - 04:12:55 EST
Thank you for your light speed review :)
> > From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
> > 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.
> > Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
> > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
> Who wrote this patch, you or Magnus? Or is this a joint effort?
Original was Magnus, and I updated it.
I think I need to add such things.
> > --- a/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
> > +++ b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
> > @@ -35,9 +35,8 @@ Required Properties:
> > - interrupts: interrupt specifiers for the DMAC, one for each entry in
> > interrupt-names.
> > -- interrupt-names: one entry for the error interrupt, named "error", plus one
> > - entry per channel, named "ch%u", where %u is the channel number ranging from
> > - zero to the number of channels minus one.
> > +- interrupt-names: one entry per channel, named "ch%u", where %u is the
> > + channel number ranging from zero to the number of channels minus one.
> DT bindings describe hardware, not software policy.
> So IMHO the error interrupt must not be removed from the bindings (and
> from the DTS and example).
> The rest looks good to me (but I haven't tested it), so with the above fixed:
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Thanks. Will post v2 tomorrow