4.17-stable review patch. If anyone has any objections, please let me know.
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From: Terry Zhou bjzhou@marvell.com
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@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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 +