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authorDoug Anderson <dianders@chromium.org>2013-06-12 21:33:17 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-06-16 14:01:54 +0400
commit5ae8cf7980858bcd7559034c716ada440e4cb181 (patch)
tree5dcf4744cf1e03fca72686fc2c7fd9fcb3e1614c /drivers/pinctrl/pinctrl-exynos.c
parentce06f40740bc9320e7a22c1964ba408f03c0d013 (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/pinctrl/pinctrl-exynos.c')
-rw-r--r--drivers/pinctrl/pinctrl-exynos.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-exynos.c b/drivers/pinctrl/pinctrl-exynos.c
index 2d76f66a2e0b..c29a28ee8d25 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)