mmc: owl-mmc: Use dma_request_chan() instead dma_request_slave_channel()
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> Link: https://lore.kernel.org/r/20191217112934.31535-1-peter.ujfalusi@ti.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -616,10 +616,10 @@ static int owl_mmc_probe(struct platform_device *pdev)
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pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
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owl_host->dma = dma_request_slave_channel(&pdev->dev, "mmc");
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if (!owl_host->dma) {
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owl_host->dma = dma_request_chan(&pdev->dev, "mmc");
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if (IS_ERR(owl_host->dma)) {
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dev_err(owl_host->dev, "Failed to get external DMA channel.\n");
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ret = -ENXIO;
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ret = PTR_ERR(owl_host->dma);
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goto err_free_host;
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}
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