Hi Adrian,
thanks for the feedbacks,
providing v5 in short, will run also checkpatch with "--strict".
On Fri, May 15, 2020 at 3:38 PM Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
>
> On 13/05/20 11:41 pm, Angelo Dureghello wrote:
> > Some controller as the ColdFire eshdc may require an endianness
> > byte swap, becouse DMA read endianness is not configurable.
> >
> > Signed-off-by: Angelo Dureghello <angelo.dureghello@xxxxxxxxxxx>
> > ---
> > Changes for v3:
> > - add post request callback
> > Changes for v4:
> > none
> > ---
> > drivers/mmc/host/sdhci.c | 7 +++++++
> > drivers/mmc/host/sdhci.h | 2 ++
> > 2 files changed, 9 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> > index 3f716466fcfd..d3bfbb6e11d5 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -637,6 +637,13 @@ static int sdhci_pre_dma_transfer(struct sdhci_host *host,
> > sg_copy_to_buffer(data->sg, data->sg_len,
> > host->bounce_buffer,
> > length);
> > +
> > + /*
> > + * Endianness can't be swapped in the sg list,
> > + * since the sg list is processed again later on.
> > + */
>
> The data in the sg list must not be changed because we don't know how
> else it might be being used. Maybe leave out the comment.
>
> > + if (host->ops->pre_dma_transfer)
> > + host->ops->pre_dma_transfer(host, data);
>
> Let's make this slightly more generic i.e.
>
> if (host->ops->copy_to_bounce_buffer) {
> host->ops->copy_to_bounce_buffer(host, data);
> } else {
> sg_copy_to_buffer(data->sg, data->sg_len,
> host->bounce_buffer,
> length);
> }
>
>
> > }
> > /* Switch ownership to the DMA */
> > dma_sync_single_for_device(host->mmc->parent,
> > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> > index 79dffbb731d3..076054308423 100644
> > --- a/drivers/mmc/host/sdhci.h
> > +++ b/drivers/mmc/host/sdhci.h
> > @@ -653,6 +653,8 @@ struct sdhci_ops {
> > void (*voltage_switch)(struct sdhci_host *host);
> > void (*adma_write_desc)(struct sdhci_host *host, void **desc,
> > dma_addr_t addr, int len, unsigned int cmd);
> > + void (*pre_dma_transfer)(struct sdhci_host *host,
> > + struct mmc_data *data);
> > void (*request_done)(struct sdhci_host *host,
> > struct mmc_request *mrq);
> > };
> >
>
Regards,
Angelo
