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iio: adc: at91-sama5d2_adc: 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.

The dma_request_chan() is the standard API to request slave channel,
clients should be moved away from the legacy API to allow us to retire
them.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Peter Ujfalusi 2020-01-07 13:37:29 +02:00 committed by Jonathan Cameron
parent 735404b846
commit 687d39d451
1 changed files with 3 additions and 3 deletions
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6
drivers/iio/adc/at91-sama5d2_adc.c
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@ -1444,10 +1444,10 @@ static void at91_adc_dma_init(struct platform_device *pdev)
if (st->dma_st.dma_chan)
return;
st->dma_st.dma_chan = dma_request_slave_channel(&pdev->dev, "rx");
if (!st->dma_st.dma_chan) {
st->dma_st.dma_chan = dma_request_chan(&pdev->dev, "rx");
if (IS_ERR(st->dma_st.dma_chan)) {
dev_info(&pdev->dev, "can't get DMA channel\n");
st->dma_st.dma_chan = NULL;
goto dma_exit;
}