[PATCH v3 1/3] net: xilinx: axienet: Propagate errors from optional IRQ lookup

[PATCH v3 1/3] net: xilinx: axienet: Propagate errors from optional IRQ lookup

[phucduc.bui]

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.

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 fcf517069d16..f92951422b2e 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2972,6 +2972,8 @@ 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

[PATCH v3 2/3] net: xilinx: axienet: Handle optional IRQ return value correctly

[phucduc.bui]

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.

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 f92951422b2e..50f88a38b6f6 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -3049,7 +3049,7 @@ 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

[PATCH v3 3/3] net: xilinx: axienet: Propagate errors from platform_get_irq()

[phucduc.bui]

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

platform_get_irq() returns a non-zero IRQ number on success and a
negative error number on failure. Therefore, 0 should not be treated
as an invalid IRQ number.

Propagate the original error code instead of overwriting it with
-ENOMEM.

Remove the redundant error message since platform_get_irq() already
reports errors when the IRQ lookup fails.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 50f88a38b6f6..d982ab6f8a4a 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2968,10 +2968,10 @@ static int axienet_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "could not map DMA regs\n");
 			return PTR_ERR(lp->dma_regs);
 		}
-		if (lp->rx_irq <= 0 || lp->tx_irq <= 0) {
-			dev_err(&pdev->dev, "could not determine irqs\n");
-			return -ENOMEM;
-		}
+		if (lp->rx_irq < 0)
+			return lp->rx_irq;
+		if (lp->tx_irq < 0)
+			return lp->tx_irq;
 		if (lp->eth_irq < 0 && lp->eth_irq != -ENXIO)
 			return lp->eth_irq;
 
-- 
2.43.0