Commit 2e2d12e1 authored Dec 17, 2019 by Peter Ujfalusi Committed by Ulf Hansson Dec 19, 2019

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>

parent 972a2dd6

drivers/mmc/host/owl-mmc.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -616,10 +616,10 @@ static int owl_mmc_probe(struct platform_device *pdev)

		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
		owl_host->dma = dma_request_slave_channel(&pdev->dev, "mmc");
		if (!owl_host->dma) {
		owl_host->dma = dma_request_chan(&pdev->dev, "mmc");
		if (IS_ERR(owl_host->dma)) {
		dev_err(owl_host->dev, "Failed to get external DMA channel.\n");
		ret = -ENXIO;
		ret = PTR_ERR(owl_host->dma);
		goto err_free_host;
		}

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