dmaengine fixes for v4.13-rc7

A single fix for tegra210-adma driver to check of_irq_get() error
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Merge tag 'dmaengine-fix-4.13-rc7' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fix from Vinod Koul:
 "A single fix for tegra210-adma driver to check of_irq_get() error"

* tag 'dmaengine-fix-4.13-rc7' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: tegra210-adma: fix of_irq_get() error check

drivers/dma/tegra210-adma.c

@@ -717,8 +717,8 @@ static int tegra_adma_probe(struct platform_device *pdev)
 		tdc->chan_addr = tdma->base_addr + ADMA_CH_REG_OFFSET(i);
 
 		tdc->irq = of_irq_get(pdev->dev.of_node, i);
-		if (tdc->irq < 0) {
-			ret = tdc->irq;
+		if (tdc->irq <= 0) {
+			ret = tdc->irq ?: -ENXIO;
 			goto irq_dispose;
 		}