[PATCH net v4 2/3] net: xilinx: axienet: Handle optional IRQ return value correctly

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

lp->eth_irq is assigned from platform_get_irq_optional(), which returns
a non-zero interrupt number on success or a negative error number on
failure. Errors other than -ENXIO are handled before this check,
so -ENXIO is the only error value that can reach this point.

Check for a negative value instead of treating 0 as an undefined IRQ.

Fixes: 522856cefaf0 ("net: axienet: Add optional support for Ethernet core interrupt")
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 207aecb5f8b9..3927ababf833 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -3052,7 +3052,7 @@ static int axienet_probe(struct platform_device *pdev)
 		ndev->ethtool_ops = &axienet_ethtool_ops;
 	}
 	/* Check for Ethernet core IRQ (optional) */
-	if (lp->eth_irq <= 0)
+	if (lp->eth_irq < 0)
 		dev_info(&pdev->dev, "Ethernet core IRQ not defined\n");
 
 	/* Retrieve the MAC address */
-- 
2.43.0