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mmc: owl-mmc: Use dma_request_chan() instead dma_request_slave_channel()

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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>
This commit is contained in:
Peter Ujfalusi 2019-12-17 13:29:34 +02:00 committed by Ulf Hansson
parent 972a2dd626
commit 2e2d12e110
1 changed files with 3 additions and 3 deletions
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6
drivers/mmc/host/owl-mmc.c
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@ -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;
}