diff options
| author | Doug Anderson <dianders@chromium.org> | 2013-06-12 17:33:17 (GMT) |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-06-16 10:01:54 (GMT) |
| commit | 5ae8cf7980858bcd7559034c716ada440e4cb181 (patch) | |
| tree | 5dcf4744cf1e03fca72686fc2c7fd9fcb3e1614c | |
| parent | ce06f40740bc9320e7a22c1964ba408f03c0d013 (diff) | |
| download | linux-5ae8cf7980858bcd7559034c716ada440e4cb181.tar.xz | |
pinctrl: exynos: Add spinlocks to irq_mask and irq_unmask
The patch:
1984695 pinctrl: samsung: Protect bank registers with a spinlock
...added spinlocks to protect many accesses. However, the irq_mask
and irq_unmask functions still do an unprotected read/modify/write.
Add the spinlock there.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/pinctrl/pinctrl-exynos.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-exynos.c b/drivers/pinctrl/pinctrl-exynos.c index 2d76f66..c29a28e 100644 --- a/drivers/pinctrl/pinctrl-exynos.c +++ b/drivers/pinctrl/pinctrl-exynos.c @@ -56,10 +56,15 @@ static void exynos_gpio_irq_unmask(struct irq_data *irqd) struct samsung_pinctrl_drv_data *d = bank->drvdata; unsigned long reg_mask = d->ctrl->geint_mask + bank->eint_offset; unsigned long mask; + unsigned long flags; + + spin_lock_irqsave(&bank->slock, flags); mask = readl(d->virt_base + reg_mask); mask &= ~(1 << irqd->hwirq); writel(mask, d->virt_base + reg_mask); + + spin_unlock_irqrestore(&bank->slock, flags); } static void exynos_gpio_irq_mask(struct irq_data *irqd) @@ -68,10 +73,15 @@ static void exynos_gpio_irq_mask(struct irq_data *irqd) struct samsung_pinctrl_drv_data *d = bank->drvdata; unsigned long reg_mask = d->ctrl->geint_mask + bank->eint_offset; unsigned long mask; + unsigned long flags; + + spin_lock_irqsave(&bank->slock, flags); mask = readl(d->virt_base + reg_mask); mask |= 1 << irqd->hwirq; writel(mask, d->virt_base + reg_mask); + + spin_unlock_irqrestore(&bank->slock, flags); } static void exynos_gpio_irq_ack(struct irq_data *irqd) @@ -264,10 +274,15 @@ static void exynos_wkup_irq_unmask(struct irq_data *irqd) struct samsung_pinctrl_drv_data *d = b->drvdata; unsigned long reg_mask = d->ctrl->weint_mask + b->eint_offset; unsigned long mask; + unsigned long flags; + + spin_lock_irqsave(&b->slock, flags); mask = readl(d->virt_base + reg_mask); mask &= ~(1 << irqd->hwirq); writel(mask, d->virt_base + reg_mask); + + spin_unlock_irqrestore(&b->slock, flags); } static void exynos_wkup_irq_mask(struct irq_data *irqd) @@ -276,10 +291,15 @@ static void exynos_wkup_irq_mask(struct irq_data *irqd) struct samsung_pinctrl_drv_data *d = b->drvdata; unsigned long reg_mask = d->ctrl->weint_mask + b->eint_offset; unsigned long mask; + unsigned long flags; + + spin_lock_irqsave(&b->slock, flags); mask = readl(d->virt_base + reg_mask); mask |= 1 << irqd->hwirq; writel(mask, d->virt_base + reg_mask); + + spin_unlock_irqrestore(&b->slock, flags); } static void exynos_wkup_irq_ack(struct irq_data *irqd) |