Re: [PATCH v3 03/16] spi: dw: Discard static DW DMA slave structures

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Thu, May 21, 2020 at 4:23 AM Serge Semin
<Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> Having them declared is redundant since each struct dw_dma_chan has
> the same structure embedded and the structure from the passed dma_chan
> private pointer will be copied there as a result of the next calls
> chain:
> dma_request_channel() -> find_candidate() -> dma_chan_get() ->
> device_alloc_chan_resources() = dwc_alloc_chan_resources() ->
> dw_dma_filter().
> So just remove the static dw_dma_chan structures and use a locally
> declared data instance with dst_id/src_id set to the same values as
> the static copies used to have.

...

> - Explicitly initialize the dw_dma_slave members on stack.

Thanks for an update, but that's not what I asked for...

> -static struct dw_dma_slave mid_dma_tx = { .dst_id = 1 };
> -static struct dw_dma_slave mid_dma_rx = { .src_id = 0 };

>  static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
>  {
> +       struct dw_dma_slave slave = {
> +               .src_id = 0,
> +               .dst_id = 0
> +       };

(It's member, and not memberS)

> -       struct dw_dma_slave *tx = dws->dma_tx;
> -       struct dw_dma_slave *rx = dws->dma_rx;

May we simple do

struct dw_dma_slave tx = { .dst_id = 1 };
struct dw_dma_slave rx = { .src_id = 0 };

please?

-- 
With Best Regards,
Andy Shevchenko