Re: [PATCH v3 4/6] mmc: uniphier-sd: add UniPhier SD/eMMC controller driver

[Ulf Hansson]

[...]

> +static void uniphier_sd_external_dma_request(struct tmio_mmc_host *host,
> +                                            struct tmio_mmc_data *pdata)
> +{
> +       struct uniphier_sd_priv *priv = uniphier_sd_priv(host);
> +       struct dma_chan *chan;
> +
> +       chan = dma_request_chan(mmc_dev(host->mmc), "rx-tx");
> +       if (IS_ERR(chan)) {
> +               dev_warn(mmc_dev(host->mmc),
> +                        "failed to request DMA channel. falling back to PIO\n");
> +               return; /* just use PIO even for -EPROBE_DEFER */
> +       }
> +
> +       /* this driver uses a single channel for both RX an TX */
> +       priv->chan = chan;
> +       host->chan_rx = chan;
> +       host->chan_tx = chan;
> +
> +       tasklet_init(&host->dma_issue, uniphier_sd_external_dma_issue,
> +                    (unsigned long)host);

Isn't it time to get rid of tasklets for tmio?

No worries, I don't require that to be changed prior $subject patch,
however using threaded IRQs is a justified modernization for the tmio
variants.

[...]

Kind regards
Uffe