Commit c3b2a021 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Ulf Hansson
Browse files

mmc: mxcmmc: 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: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191217112803.31161-1-peter.ujfalusi@ti.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 716d0205

drivers/mmc/host/mxcmmc.c

+10 −1
Original line number Diff line number Diff line
@@ -1121,7 +1121,16 @@ static int mxcmci_probe(struct platform_device *pdev) 
	mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR);



	if (!host->pdata) {

		host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx");

		host->dma = dma_request_chan(&pdev->dev, "rx-tx");

		if (IS_ERR(host->dma)) {

			if (PTR_ERR(host->dma) == -EPROBE_DEFER) {

				ret = -EPROBE_DEFER;

				goto out_clk_put;

			}



			/* Ignore errors to fall back to PIO mode */

			host->dma = NULL;

		}

	} else {

		res = platform_get_resource(pdev, IORESOURCE_DMA, 0);

		if (res) {

CRA Git | Maintained and supported by SUSTech CRA and CCSE