diff options
| -rw-r--r-- | drivers/gpio/gpio-pch.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index ca9c7b051e07..252bddbd3f44 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -55,6 +55,9 @@ struct pch_gpio_reg_data { * @gpio: Data for GPIO infrastructure. * @pch_gpio_reg: Memory mapped Register data is saved here * when suspend. + * @spinlock: Used for register access protection in + * interrupt context pch_irq_mask, + * pch_irq_unmask and pch_irq_type; */ struct pch_gpio { void __iomem *base; @@ -63,6 +66,7 @@ struct pch_gpio { struct gpio_chip gpio; struct pch_gpio_reg_data pch_gpio_reg; struct mutex lock; + spinlock_t spinlock; }; static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) @@ -239,8 +243,11 @@ static int pch_gpio_suspend(struct pci_dev *pdev, pm_message_t state) { s32 ret; struct pch_gpio *chip = pci_get_drvdata(pdev); + unsigned long flags; + spin_lock_irqsave(&chip->spinlock, flags); pch_gpio_save_reg_conf(chip); + spin_unlock_irqrestore(&chip->spinlock, flags); ret = pci_save_state(pdev); if (ret) { @@ -260,6 +267,7 @@ static int pch_gpio_resume(struct pci_dev *pdev) { s32 ret; struct pch_gpio *chip = pci_get_drvdata(pdev); + unsigned long flags; ret = pci_enable_wake(pdev, PCI_D0, 0); @@ -271,9 +279,11 @@ static int pch_gpio_resume(struct pci_dev *pdev) } pci_restore_state(pdev); + spin_lock_irqsave(&chip->spinlock, flags); iowrite32(0x01, &chip->reg->reset); iowrite32(0x00, &chip->reg->reset); pch_gpio_restore_reg_conf(chip); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } |