4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Terry Zhou <bjzhou@xxxxxxxxxxx> commit 702d1e81feae70aa16ca364b4d2d95ccad801022 upstream. 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@xxxxxxxxxxx: update comment and add fix and stable tags] Fixes: 30ac0d3b0702 ("pinctrl: armada-37xx: Add edge both type gpio irq support") Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Terry Zhou <bjzhou@xxxxxxxxxxx> Reviewed-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxx> Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxx> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c @@ -679,12 +679,13 @@ static void armada_37xx_irq_handler(stru 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 +