netdev - [PATCH net-next 05/13] can: m_can: Return ERR

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Message-ID: <20251017150819.1415685-6-mkl@pengutronix.de>
Date: Fri, 17 Oct 2025 17:04:13 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	"Markus Schneider-Pargmann (TI.com)" <msp@...libre.com>,
	Vincent Mailhol <mailhol.vincent@...adoo.fr>,
	Dhruva Gole <d-gole@...com>,
	Kendall Willis <k-willis@...com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 05/13] can: m_can: Return ERR_PTR on error in allocation

From: "Markus Schneider-Pargmann (TI.com)" <msp@...libre.com>

We have more detailed error values available, return them in the core
driver and the calling drivers to return proper errors to callers.

Reviewed-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
Reviewed-by: Dhruva Gole <d-gole@...com>
Reviewed-by: Kendall Willis <k-willis@...com>
Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@...libre.com>
Link: https://patch.msgid.link/20251001-topic-mcan-wakeup-source-v6-12-v10-3-4ab508ac5d1e@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/m_can/m_can.c          | 6 +++---
 drivers/net/can/m_can/m_can_pci.c      | 4 ++--
 drivers/net/can/m_can/m_can_platform.c | 4 ++--
 drivers/net/can/m_can/tcan4x5x-core.c  | 4 ++--
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index f00bdec3246a..10b5862b4880 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -2408,7 +2408,7 @@ struct m_can_classdev *m_can_class_allocate_dev(struct device *dev,
 					     sizeof(mram_config_vals) / 4);
 	if (ret) {
 		dev_err(dev, "Could not get Message RAM configuration.");
-		goto out;
+		return ERR_PTR(ret);
 	}
 
 	if (dev->of_node && of_property_read_bool(dev->of_node, "wakeup-source"))
@@ -2423,7 +2423,7 @@ struct m_can_classdev *m_can_class_allocate_dev(struct device *dev,
 	net_dev = alloc_candev(sizeof_priv, tx_fifo_size);
 	if (!net_dev) {
 		dev_err(dev, "Failed to allocate CAN device");
-		goto out;
+		return ERR_PTR(-ENOMEM);
 	}
 
 	class_dev = netdev_priv(net_dev);
@@ -2433,7 +2433,7 @@ struct m_can_classdev *m_can_class_allocate_dev(struct device *dev,
 
 	m_can_of_parse_mram(class_dev, mram_config_vals);
 	spin_lock_init(&class_dev->tx_handling_spinlock);
-out:
+
 	return class_dev;
 }
 EXPORT_SYMBOL_GPL(m_can_class_allocate_dev);
diff --git a/drivers/net/can/m_can/m_can_pci.c b/drivers/net/can/m_can/m_can_pci.c
index 9ad7419f88f8..eb31ed1f9644 100644
--- a/drivers/net/can/m_can/m_can_pci.c
+++ b/drivers/net/can/m_can/m_can_pci.c
@@ -111,8 +111,8 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 
 	mcan_class = m_can_class_allocate_dev(&pci->dev,
 					      sizeof(struct m_can_pci_priv));
-	if (!mcan_class)
-		return -ENOMEM;
+	if (IS_ERR(mcan_class))
+		return PTR_ERR(mcan_class);
 
 	priv = cdev_to_priv(mcan_class);
 
diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c
index 4a412add2b8d..56da411878af 100644
--- a/drivers/net/can/m_can/m_can_platform.c
+++ b/drivers/net/can/m_can/m_can_platform.c
@@ -87,8 +87,8 @@ static int m_can_plat_probe(struct platform_device *pdev)
 
 	mcan_class = m_can_class_allocate_dev(&pdev->dev,
 					      sizeof(struct m_can_plat_priv));
-	if (!mcan_class)
-		return -ENOMEM;
+	if (IS_ERR(mcan_class))
+		return PTR_ERR(mcan_class);
 
 	priv = cdev_to_priv(mcan_class);
 
diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 39b0b5277b11..31cc9d0abd45 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -416,8 +416,8 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
 
 	mcan_class = m_can_class_allocate_dev(&spi->dev,
 					      sizeof(struct tcan4x5x_priv));
-	if (!mcan_class)
-		return -ENOMEM;
+	if (IS_ERR(mcan_class))
+		return PTR_ERR(mcan_class);
 
 	ret = m_can_check_mram_cfg(mcan_class, TCAN4X5X_MRAM_SIZE);
 	if (ret)
-- 
2.51.0