On Fri, May 19, 2017 at 04:20:35PM +0200, Alexandre Bailon wrote:
> If dma_request_slave_channel() failed to return a channel,
> then the driver will print an error and request to defer probe,
> regardless of the cause of the failure.
> Defer if the DMA is not ready yet otherwise print an error.
>
> Signed-off-by: Alexandre Bailon <abai...@baylibre.com>
> Reviewed-by: Johan Hovold <jo...@kernel.org>
Applied. Thanks.
-Bin.
> ---
> drivers/usb/musb/musb_cppi41.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
> index e7c8b1b..ba25528 100644
> --- a/drivers/usb/musb/musb_cppi41.c
> +++ b/drivers/usb/musb/musb_cppi41.c
> @@ -673,12 +673,15 @@ static int cppi41_dma_controller_start(struct
> cppi41_dma_controller *controller)
> musb_dma->status = MUSB_DMA_STATUS_FREE;
> musb_dma->max_len = SZ_4M;
>
> - dc = dma_request_slave_channel(dev->parent, str);
> - if (!dc) {
> - dev_err(dev, "Failed to request %s.\n", str);
> - ret = -EPROBE_DEFER;
> + dc = dma_request_chan(dev->parent, str);
> + if (IS_ERR(dc)) {
> + ret = PTR_ERR(dc);
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev, "Failed to request %s: %d.\n",
> + str, ret);
> goto err;
> }
> +
> cppi41_channel->dc = dc;
> }
> return 0;
> --
> 2.10.2
>
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