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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-08-28 22:50:43 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-09-01 13:48:29 +0200 |
| commit | c4df606c40c3ac8ba76ad11fdbb10139f7fbb261 (patch) | |
| tree | 92451694842414adefc023fc454e12ac0f8446e7 /kernel/irq | |
| parent | 092fadd59b50208f6859f89dd7ea84e03955b544 (diff) | |
| download | linux-stable-c4df606c40c3ac8ba76ad11fdbb10139f7fbb261.tar.gz linux-stable-c4df606c40c3ac8ba76ad11fdbb10139f7fbb261.tar.bz2 linux-stable-c4df606c40c3ac8ba76ad11fdbb10139f7fbb261.zip | |
genirq: Avoid double loop on suspend
We can synchronize the suspended interrupts right away. No need for an
extra loop.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/pm.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index a21b3dc9825a..cf0ce0163db9 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -49,10 +49,10 @@ void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) desc->no_suspend_depth--; } -static void suspend_device_irq(struct irq_desc *desc, int irq) +static bool suspend_device_irq(struct irq_desc *desc, int irq) { if (!desc->action || desc->no_suspend_depth) - return; + return false; desc->istate |= IRQS_SUSPENDED; __disable_irq(desc, irq); @@ -65,6 +65,7 @@ static void suspend_device_irq(struct irq_desc *desc, int irq) */ if (irq_desc_get_chip(desc)->flags & IRQCHIP_MASK_ON_SUSPEND) mask_irq(desc); + return true; } /** @@ -86,15 +87,15 @@ void suspend_device_irqs(void) for_each_irq_desc(irq, desc) { unsigned long flags; + bool sync; raw_spin_lock_irqsave(&desc->lock, flags); - suspend_device_irq(desc, irq); + sync = suspend_device_irq(desc, irq); raw_spin_unlock_irqrestore(&desc->lock, flags); - } - for_each_irq_desc(irq, desc) - if (desc->istate & IRQS_SUSPENDED) + if (sync) synchronize_irq(irq); + } } EXPORT_SYMBOL_GPL(suspend_device_irqs); |