[PATCH net v4 1/3] net: xilinx: axienet: Propagate errors from optional IRQ lookup

[phucduc.bui@gmail.com]

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

platform_get_irq_optional() returns a positive IRQ number on success or
a negative error code on failure. For an optional IRQ, -ENXIO indicates
that no optional IRQ is available, while other errors should be propagated.

Propagate all error codes returned by platform_get_irq_optional() other
than -ENXIO.

Another call to platform_get_irq_optional() in the same function already
handles the return value this way. Apply the same error handling to this
call site for consistency.

Fixes: d6349e3e14c7 ("net: axienet: Mark eth_irq as optional")
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, 2 insertions(+)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 1722b7038f34..207aecb5f8b9 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2975,6 +2975,8 @@ static int axienet_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "could not determine irqs\n");
 			return -ENOMEM;
 		}
+		if (lp->eth_irq < 0 && lp->eth_irq != -ENXIO)
+			return lp->eth_irq;
 
 		/* Reset core now that clocks are enabled, prior to accessing MDIO */
 		ret = __axienet_device_reset(lp);
-- 
2.43.0