RE: [PATCH v1 RFC 1/2] spi: introduce fallback to pio

[Robin Gong <yibin.gong@xxxxxxx>]

On 2020/06/16 Mark Brown <broonie@xxxxxxxxxx> wrote:
> On Tue, Jun 16, 2020 at 02:03:40AM +0000, Robin Gong wrote:
> >         struct list_head transfer_list;
> > +
> > +#define        SPI_TRANS_DMA_PREP_FAIL BIT(3)  /* prepare dma
> failed */
> > +       u16             flags;
> 
> I'd just make this a generic flag for failures before we start interacting with the
> hardware rather than specifically this one error case.  Otherwise this looks
> fine.
So rename to SPI_TRANS_DMA_FAIL? I think at least DMA is MUST for fallback
case...