Re: [PATCH 1/2] mmc: renesas_sdhi_internal_dmac: Fix missing unmap in error patch

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Hi Shimoda-san,

On Thu, Jun 28, 2018 at 1:53 PM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
> This patch fixes an issue that lacks the dma_unmap_sg() calling in
> the error patch of renesas_sdhi_internal_dmac_start_dma().

Nice catch!
Thanks for your patch!

> Fixes: 0cbc94daa554 ("mmc: renesas_sdhi_internal_dmac: limit DMA RX for old SoCs")
> Cc: <stable@xxxxxxxxxxxxxxx> # v4.17+
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>

Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

> --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
> +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
> @@ -173,8 +173,11 @@
>         if (data->flags & MMC_DATA_READ) {
>                 dtran_mode |= DTRAN_MODE_CH_NUM_CH1;
>                 if (test_bit(SDHI_INTERNAL_DMAC_ONE_RX_ONLY, &global_flags) &&
> -                   test_and_set_bit(SDHI_INTERNAL_DMAC_RX_IN_USE, &global_flags))
> +                   test_and_set_bit(SDHI_INTERNAL_DMAC_RX_IN_USE, &global_flags)) {
> +                       dma_unmap_sg(&host->pdev->dev, sg, host->sg_len,
> +                                    mmc_get_dma_dir(data));

Given there is already a call to dma_unmap_sg() a few lines earlier , you
may want to introduce a new label before force_pio, and move the call to
dma_unmap_sg() there.

>                         goto force_pio;
> +               }
>         } else {
>                 dtran_mode |= DTRAN_MODE_CH_NUM_CH0;
>         }

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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