Hi,
> Then we'll have a "useless" update. Won't hurt AFAICS, but might
> surprise people examining the debug output.
Ok.
> > I only compile tested this so far, so no proper patch yet, but what I would
> > write based on the comments is something like this:
>
> (Sidenote: Indentation is broken. Tabwidth is 8)
Well yes, that is what yahoo likes to break. I will send a proper patch via
git send-email if/when I have actually tested it and it seems to work.
>
> > --- a/drivers/mmc/host/sdhci.h
> > +++ b/drivers/mmc/host/sdhci.h
> > @@ -1545,9 +1546,20 @@ static void sdhci_data_irq(struct sdhci_host *host,
>u32
>
> > intmask)
> > * boundaries, but as we can't disable the feature
> > * we need to at least restart the transfer.
> > */
> > - if (intmask & SDHCI_INT_DMA_END)
> > - sdhci_writel(host, sdhci_readl(host, SDHCI_DMA_ADDRESS),
> > - SDHCI_DMA_ADDRESS);
> > + if (intmask & SDHCI_INT_DMA_END) {
> > + u32 dmastart, dmanow;
> > + dmastart = sg_dma_address(host->data->sg);
>
> Consecutive transfers won't work (I know you know ;)).
I assume you mean a single transfer that exceeds whatever is
defined in SDHCI_DEFAULT_BOUNDARY_SIZE. As long as
it is kept at 512K things should be fine, but adding the auxiliary
variable to facilitate smaller values would make the patch
more invasive. Being an mmc non-hacker, I would rather leave
that kind of invasive patches for others :)
>
> > + dmanow = sdhci_readl(host, SDHCI_DMA_ADDRESS);
> > + /*
> > + * Force update to the next DMA block boundary.
> > + */
> > + dmanow = (dmastart &
> > + ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
> > + SDHCI_DEFAULT_BOUNDARY_SIZE;
> > + DBG("%s: next DMA address after 0x%08x is 0x%08x\n",
> > + mmc_hostname(host->mmc), dmastart, dmanow);
> > + sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
> > + }
>
> Other than that, looks like the right direction to me.
Good to hear.
Mikko
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