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mmc: pxamci: 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/20191217113004.31688-1-peter.ujfalusi@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Peter Ujfalusi 2019-12-17 13:30:04 +02:00 committed by Ulf Hansson
parent 2e2d12e110
commit e1ebb456ae
1 changed files with 8 additions and 6 deletions
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14
drivers/mmc/host/pxamci.c
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@ -710,17 +710,19 @@ static int pxamci_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mmc);
host->dma_chan_rx = dma_request_slave_channel(dev, "rx");
if (host->dma_chan_rx == NULL) {
host->dma_chan_rx = dma_request_chan(dev, "rx");
if (IS_ERR(host->dma_chan_rx)) {
dev_err(dev, "unable to request rx dma channel\n");
ret = -ENODEV;
ret = PTR_ERR(host->dma_chan_rx);
host->dma_chan_rx = NULL;
goto out;
}
host->dma_chan_tx = dma_request_slave_channel(dev, "tx");
if (host->dma_chan_tx == NULL) {
host->dma_chan_tx = dma_request_chan(dev, "tx");
if (IS_ERR(host->dma_chan_tx)) {
dev_err(dev, "unable to request tx dma channel\n");
ret = -ENODEV;
ret = PTR_ERR(host->dma_chan_tx);
host->dma_chan_tx = NULL;
goto out;
}