[PATCH v3] dmaengine: moxart: handle irq_of_parse_and_map() errors

[Ma Ke <make24@iscas.ac.cn>]

Zero and negative number is not a valid IRQ for in-kernel code and the
irq_of_parse_and_map() function returns zero on error.  So this check for
valid IRQs should only accept values > 0.

Cc: stable@vger.kernel.org
Fixes: 2d9e31b9412c ("dmaengine: moxart: remove NO_IRQ")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
---
Changes in v3:
- added missed changelog v2.
Changes in v2:
- added Cc stable line;
- added Fixes line.
---
 drivers/dma/moxart-dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/moxart-dma.c b/drivers/dma/moxart-dma.c
index 66dc6d31b603..16dd3c5aba4d 100644
--- a/drivers/dma/moxart-dma.c
+++ b/drivers/dma/moxart-dma.c
@@ -568,7 +568,7 @@ static int moxart_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	irq = irq_of_parse_and_map(node, 0);
-	if (!irq) {
+	if (irq <= 0) {
 		dev_err(dev, "no IRQ resource\n");
 		return -EINVAL;
 	}
-- 
2.25.1