This func misses checking for platform_get_irq()'s call and may passes the
negative error codes to request_threaded_irq(), which takes unsigned IRQ #,
causing it to fail with -EINVAL, overriding an original error code.
Stop calling request_threaded_irq() with invalid IRQ #s.
Fixes: 47e20577c24d ("dmaengine: Add Actions Semi Owl family S900 DMA driver")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
---
drivers/dma/owl-dma.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c
index 1f0bbaed4643..09cdaecee635 100644
--- a/drivers/dma/owl-dma.c
+++ b/drivers/dma/owl-dma.c
@@ -1160,6 +1160,11 @@ static int owl_dma_probe(struct platform_device *pdev)
* simplification.
*/
od->irq = platform_get_irq(pdev, 0);
+ if (od->irq < 0) {
+ dev_err(&pdev->dev, "unable to get IRQ\n");
+ return od->irq;
+ }
+
ret = devm_request_irq(&pdev->dev, od->irq, owl_dma_interrupt, 0,
dev_name(&pdev->dev), od);
if (ret) {
--
2.17.1
