iio: adc: at91-sama5d2: Replace 0 with NULL when clearing some pointers.

Cleans up the sparse warning:

CHECK   drivers/iio/adc/at91-sama5d2_adc.c
drivers/iio/adc/at91-sama5d2_adc.c:1486:31: warning: Using plain integer as NULL pointer
drivers/iio/adc/at91-sama5d2_adc.c:1509:31: warning: Using plain integer as NULL pointer

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Eugen Hristev <eugen.hristev@microchip.com>

diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index a2837a0..e1850f3 100644 (file)
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1483,7 +1483,7 @@ dma_free_area:
                          st->dma_st.rx_buf, st->dma_st.rx_dma_buf);
 dma_chan_disable:
        dma_release_channel(st->dma_st.dma_chan);
-       st->dma_st.dma_chan = 0;
+       st->dma_st.dma_chan = NULL;
 dma_exit:
        dev_info(&pdev->dev, "continuing without DMA support\n");
 }
@@ -1506,7 +1506,7 @@ static void at91_adc_dma_disable(struct platform_device *pdev)
        dma_free_coherent(st->dma_st.dma_chan->device->dev, pages * PAGE_SIZE,
                          st->dma_st.rx_buf, st->dma_st.rx_dma_buf);
        dma_release_channel(st->dma_st.dma_chan);
-       st->dma_st.dma_chan = 0;
+       st->dma_st.dma_chan = NULL;
 
        dev_info(&pdev->dev, "continuing without DMA support\n");
 }