On Jan 29, 2008 11:10 AM, Haavard Skinnemoen <[EMAIL PROTECTED]> wrote:
[..]
> +/*
> + * Returns a mask of flags to be set in the command register when the
> + * command to start the transfer is to be sent.
> + */
> +static u32 atmci_prepare_data(struct mmc_host *mmc, struct mmc_data *data)
[..]
> + for_each_sg(data->sg, sg, sg_len, i) {
> + if (i == sg_len - 1)
> + dma_flags = DMA_PREP_INTERRUPT;
> +
> + dev_vdbg(&mmc->class_dev, " addr %08x len %u\n",
> + sg_dma_address(sg), sg_dma_len(sg));
> +
> + desc = chan->device->device_prep_slave(chan,
> + sg_dma_address(sg), direction,
> + DMA_SLAVE_WIDTH_32BIT,
> + sg_dma_len(sg), dma_flags);
> + desc->txd.callback = NULL;
> + list_add_tail(&desc->client_node,
> + &host->dma.data_descs);
> + }
Need to handle device_prep_slave returning NULL?
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