3 files changed, 26 insertions, 15 deletions

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index b1893bb27d59..be8f4b662f95 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1243,10 +1243,17 @@ static int m_can_set_bittiming(struct net_device *dev)
  * - setup bittiming
  * - configure timestamp generation
  */
-static void m_can_chip_config(struct net_device *dev)
+static int m_can_chip_config(struct net_device *dev)
 {
 	struct m_can_classdev *cdev = netdev_priv(dev);
 	u32 cccr, test;
+	int err;
+
+	err = m_can_init_ram(cdev);
+	if (err) {
+		dev_err(cdev->dev, "Message RAM configuration failed\n");
+		return err;
+	}
 
 	m_can_config_endisable(cdev, true);
 
@@ -1370,18 +1377,25 @@ static void m_can_chip_config(struct net_device *dev)
 
 	if (cdev->ops->init)
 		cdev->ops->init(cdev);
+
+	return 0;
 }
 
-static void m_can_start(struct net_device *dev)
+static int m_can_start(struct net_device *dev)
 {
 	struct m_can_classdev *cdev = netdev_priv(dev);
+	int ret;
 
 	/* basic m_can configuration */
-	m_can_chip_config(dev);
+	ret = m_can_chip_config(dev);
+	if (ret)
+		return ret;
 
 	cdev->can.state = CAN_STATE_ERROR_ACTIVE;
 
 	m_can_enable_all_interrupts(cdev);
+
+	return 0;
 }
 
 static int m_can_set_mode(struct net_device *dev, enum can_mode mode)
@@ -1809,7 +1823,9 @@ static int m_can_open(struct net_device *dev)
 	}
 
 	/* start the m_can controller */
-	m_can_start(dev);
+	err = m_can_start(dev);
+	if (err)
+		goto exit_irq_fail;
 
 	if (!cdev->is_peripheral)
 		napi_enable(&cdev->napi);
@@ -2068,9 +2084,13 @@ int m_can_class_resume(struct device *dev)
 		ret = m_can_clk_start(cdev);
 		if (ret)
 			return ret;
+		ret  = m_can_start(ndev);
+		if (ret) {
+			m_can_clk_stop(cdev);
+
+			return ret;
+		}
 
-		m_can_init_ram(cdev);
-		m_can_start(ndev);
 		netif_device_attach(ndev);
 		netif_start_queue(ndev);
 	}
diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c
index b5a5bedb3116..9c1dcf838006 100644
--- a/drivers/net/can/m_can/m_can_platform.c
+++ b/drivers/net/can/m_can/m_can_platform.c
@@ -140,10 +140,6 @@ static int m_can_plat_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, mcan_class);
 
-	ret = m_can_init_ram(mcan_class);
-	if (ret)
-		goto probe_fail;
-
 	pm_runtime_enable(mcan_class->dev);
 	ret = m_can_class_register(mcan_class);
 	if (ret)
diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 41645a24384c..a3aeb83de152 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -234,11 +234,6 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
 	if (ret)
 		return ret;
 
-	/* Zero out the MCAN buffers */
-	ret = m_can_init_ram(cdev);
-	if (ret)
-		return ret;
-
 	ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
 				 TCAN4X5X_MODE_SEL_MASK, TCAN4X5X_MODE_NORMAL);
 	if (ret)