[PATCH net 6/6] can: flexcan: disable all IRQ lines in flexcan_chip_interrupts_enable()

[Marc Kleine-Budde <mkl@pengutronix.de>]

From: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com>

flexcan_chip_interrupts_enable() disables only the primary IRQ line while
writing to the IMASK and CTRL registers.

On multi-IRQ platforms (S32G2, MCF5441X), the additional IRQ lines (boff,
err, secondary-mb) remain active so their handlers can fire while
registers are inconsistent.

Disable all registered IRQ lines around the IMASK/CTRL writes. This
also fixes the resume path, which calls this function.

Signed-off-by: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com>
Link: https://patch.msgid.link/20260326135825.3428856-3-ciprianmarian.costea@oss.nxp.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/flexcan/flexcan-core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/can/flexcan/flexcan-core.c b/drivers/net/can/flexcan/flexcan-core.c
index f5d22c61503f..b3bb9acc5a2c 100644
--- a/drivers/net/can/flexcan/flexcan-core.c
+++ b/drivers/net/can/flexcan/flexcan-core.c
@@ -1430,14 +1430,28 @@ static void flexcan_chip_interrupts_enable(const struct net_device *dev)
 {
 	const struct flexcan_priv *priv = netdev_priv(dev);
 	struct flexcan_regs __iomem *regs = priv->regs;
+	u32 quirks = priv->devtype_data.quirks;
 	u64 reg_imask;
 
 	disable_irq(dev->irq);
+	if (quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
+		disable_irq(priv->irq_boff);
+		disable_irq(priv->irq_err);
+	}
+	if (quirks & FLEXCAN_QUIRK_SECONDARY_MB_IRQ)
+		disable_irq(priv->irq_secondary_mb);
+
 	priv->write(priv->reg_ctrl_default, &regs->ctrl);
 	reg_imask = priv->rx_mask | priv->tx_mask;
 	priv->write(upper_32_bits(reg_imask), &regs->imask2);
 	priv->write(lower_32_bits(reg_imask), &regs->imask1);
 	enable_irq(dev->irq);
+	if (quirks & FLEXCAN_QUIRK_SECONDARY_MB_IRQ)
+		enable_irq(priv->irq_secondary_mb);
+	if (quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
+		enable_irq(priv->irq_boff);
+		enable_irq(priv->irq_err);
+	}
 }
 
 static void flexcan_chip_interrupts_disable(const struct net_device *dev)
-- 
2.53.0