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Diffstat (limited to 'drivers/pinctrl/pinctrl-amd.c')
-rw-r--r--drivers/pinctrl/pinctrl-amd.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index 06362bf84a5b..8ed2a90a8d44 100644
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -534,8 +534,16 @@ static irqreturn_t amd_gpio_irq_handler(int irq, void *dev_id)
continue;
irq = irq_find_mapping(gc->irq.domain, irqnr + i);
generic_handle_irq(irq);
- /* Clear interrupt */
+
+ /* Clear interrupt.
+ * We must read the pin register again, in case the
+ * value was changed while executing
+ * generic_handle_irq() above.
+ */
+ raw_spin_lock_irqsave(&gpio_dev->lock, flags);
+ regval = readl(regs + i);
writel(regval, regs + i);
+ raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
ret = IRQ_HANDLED;
}
}