dmaengine: stm32-dma: use platform_get_irq()

platform_get_resource(pdev, IORESOURCE_IRQ) is not recommended for
requesting IRQ's resources, as they can be not ready yet. Using
platform_get_irq() instead is preferred for getting IRQ even if it was
not retrieved earlier.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index ba239b529fa9..33068185c0fe 100644
--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -1302,13 +1302,14 @@ static int stm32_dma_probe(struct platform_device *pdev)
 
         for (i = 0; i < STM32_DMA_MAX_CHANNELS; i++) {
                 chan = &dmadev->chan[i];
-                res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
-                if (!res) {
-                        ret = -EINVAL;
-                        dev_err(&pdev->dev, "No irq resource for chan %d\n", i);
+                chan->irq = platform_get_irq(pdev, i);
+                if (chan->irq < 0)  {
+                        ret = chan->irq;
+                        if (ret != -EPROBE_DEFER)
+                                dev_err(&pdev->dev,
+                                        "No irq resource for chan %d\n", i);
                         goto err_unregister;
                 }
-                chan->irq = res->start;
                 ret = devm_request_irq(&pdev->dev, chan->irq,
                                        stm32_dma_chan_irq, 0,
                                        dev_name(chan2dev(chan)), chan);