Re: [PATCH 20/63] dmaengine: ste_dma40: Remove unnecessary call to d40_phy_cfg()

[Linus Walleij]

On Fri, May 3, 2013 at 4:32 PM, Lee Jones <lee.jones@xxxxxxxxxx> wrote:

> All configuration left in d40_phy_cfg() is runtime configurable and
> there is already a call into it from d40_runtime_config(), so let's
> rely on that.
>
> Acked-by: Vinod Koul <vnod.koul@xxxxxxxxx>
> Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
(...)

> @@ -2027,6 +2027,14 @@ static int d40_config_memcpy(struct d40_chan *d40c)
>         } else if (dma_has_cap(DMA_MEMCPY, cap) &&
>                    dma_has_cap(DMA_SLAVE, cap)) {
>                 d40c->dma_cfg = dma40_memcpy_conf_phy;
> +
> +               /* Generate interrrupt at end of transfer or relink. */
> +               d40c->dst_def_cfg |= BIT(D40_SREG_CFG_TIM_POS);
> +
> +               /* Generate interrupt on error. */
> +               d40c->src_def_cfg |= BIT(D40_SREG_CFG_EIM_POS);
> +               d40c->dst_def_cfg |= BIT(D40_SREG_CFG_EIM_POS);
> +

This hunk looks like it's fixing a bug introduced in patch 19/63.

Do you try to run a memcpy test after patch 19?

Breaking the drive in one patch and fixing it in the next is
a no-no because of bisection.

Maybe things work fine if you just move this hunk of the
patch over to 19/63?

Apart from this the patch looks fine.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/