Messages in this thread Patch in this message | | | From | Peter Ujfalusi <> | Subject | [PATCH] iio: adc: stm32-dfsdm: Use dma_request_chan() instead dma_request_slave_channel() | Date | Tue, 17 Dec 2019 09:52:21 +0200 |
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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> --- drivers/iio/adc/stm32-dfsdm-adc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index e493242c266e..3aac1a21f9d0 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -1383,9 +1383,9 @@ static int stm32_dfsdm_dma_request(struct iio_dev *indio_dev) { struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); - adc->dma_chan = dma_request_slave_channel(&indio_dev->dev, "rx"); - if (!adc->dma_chan) - return -EINVAL; + adc->dma_chan = dma_request_chan(&indio_dev->dev, "rx"); + if (IS_ERR(adc->dma_chan)) + return PTR_ERR(adc->dma_chan); adc->rx_buf = dma_alloc_coherent(adc->dma_chan->device->dev, DFSDM_DMA_BUFFER_SIZE, -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
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