James Hogan <[email protected]> wrote:
> On Thu, Feb 16, 2012 at 11:19:38AM +0900, Jaehoon Chung wrote:
> > When disable CONFIG_MMC_DW_IDMAC, can see the compiler error.
> > Because in dw_mci_post_req(), called the dw_mci_get_dma_dir().
> > But that function is in #ifdef CONFIG_MMC_DW_IDMAC.
> >
> > I think that function is generic function.
> > Not need the CONFIG_MMC_DW_IDMAC.
> >
> > Signed-off-by: Jaehoon Chung <[email protected]>
> > Signed-off-by: Kyungmin Park <[email protected]>
>
> I've also tested and confirmed that this fixes a compiler error
> introduced in 3ec7699d3bb1b0ee7f6e8588974a209d47fc64b2 ("mmc: dw_mmc:
> Add support for pre_req and post_req"), however that patch also seems to
> have regressed by disabled DMA when not using the internal DMAC.
>
> Specifically dw_mci_pre_dma_transfer() returns -ENOSYS when not using
> internal DMAC, which makes dw_mci_submit_data_dma() now return early:
>
> + sg_len = dw_mci_pre_dma_transfer(host, data, 0);
> + if (sg_len < 0)
> + return sg_len;
>
> I think that 3ec7699d3bb1b0ee7f6e8588974a209d47fc64b2 should be
> removed/reverted until it is fixed.
Thank you for investigation.
It could be fixed.
Best regards,
Seungwon Jeon.
>
> Regards
> James
>
> > ---
> > drivers/mmc/host/dw_mmc.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> > index f9457e5..692c3ba 100644
> > --- a/drivers/mmc/host/dw_mmc.c
> > +++ b/drivers/mmc/host/dw_mmc.c
> > @@ -295,7 +295,6 @@ static void dw_mci_stop_dma(struct dw_mci *host)
> > }
> > }
> >
> > -#ifdef CONFIG_MMC_DW_IDMAC
> > static int dw_mci_get_dma_dir(struct mmc_data *data)
> > {
> > if (data->flags & MMC_DATA_WRITE)
> > @@ -304,6 +303,7 @@ static int dw_mci_get_dma_dir(struct mmc_data *data)
> > return DMA_FROM_DEVICE;
> > }
> >
> > +#ifdef CONFIG_MMC_DW_IDMAC
> > static void dw_mci_dma_cleanup(struct dw_mci *host)
> > {
> > struct mmc_data *data = host->data;
> > --
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