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SubjectRe: [PATCH] ata: pata_arasam_cf: Use dma_request_chan() instead dma_request_slave_channel()
On 17-12-19, 12:50, Peter Ujfalusi wrote:
> dma_request_slave_channel() is a wrapper on top of dma_request_chan()
> eating up the error code.
>
> By using dma_request_chan() directly the driver can support deferred
> probing against DMA.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> ---
> drivers/ata/pata_arasan_cf.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
> index 135173c8d138..69b555d83f68 100644
> --- a/drivers/ata/pata_arasan_cf.c
> +++ b/drivers/ata/pata_arasan_cf.c
> @@ -526,9 +526,10 @@ static void data_xfer(struct work_struct *work)
>
> /* request dma channels */
> /* dma_request_channel may sleep, so calling from process context */
> - acdev->dma_chan = dma_request_slave_channel(acdev->host->dev, "data");
> - if (!acdev->dma_chan) {
> + acdev->dma_chan = dma_request_chan(acdev->host->dev, "data");
> + if (IS_ERR(acdev->dma_chan)) {
> dev_err(acdev->host->dev, "Unable to get dma_chan\n");
> + acdev->dma_chan = NULL;
> goto chan_request_fail;
> }
>
> @@ -539,6 +540,7 @@ static void data_xfer(struct work_struct *work)
> }
>
> dma_release_channel(acdev->dma_chan);
> + acdev->dma_chan = NULL;
>
> /* data xferred successfully */
> if (!ret) {

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

--
viresh

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