From 9a520fd99f2c3feb178d6d05e347beb9017dc07b Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 8 Jul 2016 14:30:46 +0300 Subject: [PATCH] pinctrl: intel: Protect set wake flow by spin lock It seems intel_gpio_irq_wake() misses lock protection against I/O flow. Use spin lock here as well. Signed-off-by: Andy Shevchenko Acked-by: Mika Westerberg Signed-off-by: Linus Walleij --- drivers/pinctrl/intel/pinctrl-intel.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c index fe19b1e7b278..257cab129692 100644 --- a/drivers/pinctrl/intel/pinctrl-intel.c +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -796,12 +796,15 @@ static int intel_gpio_irq_wake(struct irq_data *d, unsigned int on) const struct intel_community *community; unsigned pin = irqd_to_hwirq(d); unsigned padno, gpp, gpp_offset; + unsigned long flags; u32 gpe_en; community = intel_get_community(pctrl, pin); if (!community) return -EINVAL; + raw_spin_lock_irqsave(&pctrl->lock, flags); + padno = pin_to_padno(community, pin); gpp = padno / community->gpp_size; gpp_offset = padno % community->gpp_size; @@ -821,6 +824,8 @@ static int intel_gpio_irq_wake(struct irq_data *d, unsigned int on) gpe_en &= ~BIT(gpp_offset); writel(gpe_en, community->regs + GPI_GPE_EN + gpp * 4); + raw_spin_unlock_irqrestore(&pctrl->lock, flags); + dev_dbg(pctrl->dev, "%sable wake for pin %u\n", on ? "en" : "dis", pin); return 0; } -- 2.20.1