[PATCH v2 3/7] can: m_can: Return ERR_PTR on error in allocation

[Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>]

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

Signed-off-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
---
 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 2e4ccf05e162..5b80a7d1f9a1 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -2352,7 +2352,7 @@ 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"))
@@ -2367,7 +2367,7 @@ 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);
@@ -2376,7 +2376,7 @@ struct m_can_classdev *m_can_class_allocate_dev(struct device *dev,
 	SET_NETDEV_DEV(net_dev, dev);
 
 	m_can_of_parse_mram(class_dev, mram_config_vals);
-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 d72fe771dfc7..05a01dfdbfbf 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 983ab80260dd..a5024e2cff8d 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 2f73bf3abad8..4c40b4447275 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -375,8 +375,8 @@ 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)
-- 
2.45.2