pinctrl: armada-37xx: Fix spurious irq management

Until now, if we found spurious irq in irq_handler, we only updated the
status in register but not the status in the code. Due to this the system
will got stuck dues to the infinite loop

[gregory.clement@bootlin.com: update comment and add fix and stable tags]
Fixes: 30ac0d3b0702 ("pinctrl: armada-37xx: Add edge both type gpio irq support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Terry Zhou <bjzhou@marvell.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index 0f1eafb..674ffdf 100644 (file)
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -666,12 +666,13 @@ static void armada_37xx_irq_handler(struct irq_desc *desc)
                                        writel(1 << hwirq,
                                               info->base +
                                               IRQ_STATUS + 4 * i);
-                                       continue;
+                                       goto update_status;
                                }
                        }
 
                        generic_handle_irq(virq);
 
+update_status:
                        /* Update status in case a new IRQ appears */
                        spin_lock_irqsave(&info->irq_lock, flags);
                        status = readl_relaxed(info->base +