diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2016-07-08 14:30:46 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-07-11 12:15:33 +0300 |
| commit | 9a520fd99f2c3feb178d6d05e347beb9017dc07b (patch) | |
| tree | bbb76e6994d930ce8a7c014020e3c68f26d19c35 /drivers/pinctrl/intel | |
| parent | a6e5e4a6243d7afce486d89c32481564bf669844 (diff) | |
| download | linux-9a520fd99f2c3feb178d6d05e347beb9017dc07b.tar.xz | |
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 <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/intel')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-intel.c | 5 |
1 files changed, 5 insertions, 0 deletions
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; } |