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-rw-r--r--drivers/pinctrl/pinctrl-amd.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index 60d88e1df272..2c61141519f8 100644
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -565,15 +565,25 @@ static irqreturn_t amd_gpio_irq_handler(int irq, void *dev_id)
!(regval & BIT(INTERRUPT_MASK_OFF)))
continue;
irq = irq_find_mapping(gc->irq.domain, irqnr + i);
- generic_handle_irq(irq);
+ if (irq != 0)
+ generic_handle_irq(irq);
/* Clear interrupt.
* We must read the pin register again, in case the
* value was changed while executing
* generic_handle_irq() above.
+ * If we didn't find a mapping for the interrupt,
+ * disable it in order to avoid a system hang caused
+ * by an interrupt storm.
*/
raw_spin_lock_irqsave(&gpio_dev->lock, flags);
regval = readl(regs + i);
+ if (irq == 0) {
+ regval &= ~BIT(INTERRUPT_ENABLE_OFF);
+ dev_dbg(&gpio_dev->pdev->dev,
+ "Disabling spurious GPIO IRQ %d\n",
+ irqnr + i);
+ }
writel(regval, regs + i);
raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
ret = IRQ_HANDLED;