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| author | Dmitry Torokhov <dtor@insightbb.com> | 2006-08-04 22:50:27 -0400 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2006-08-04 22:50:27 -0400 |
| commit | d932cb7e630cae3b6b5307b767d296ff1a597c5e (patch) | |
| tree | f930d068a12a256fabef0864bcdf8e85f095369e /kernel/irq/manage.c | |
| parent | 73b59a3b1c09e4bfc678400b77b96134dcfbf112 (diff) | |
| parent | f5d635f649607b09b0b4620d25d028fd2b1b7ea5 (diff) | |
| download | kernel-crypto-d932cb7e630cae3b6b5307b767d296ff1a597c5e.tar.gz kernel-crypto-d932cb7e630cae3b6b5307b767d296ff1a597c5e.tar.xz kernel-crypto-d932cb7e630cae3b6b5307b767d296ff1a597c5e.zip | |
Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus
Diffstat (limited to 'kernel/irq/manage.c')
| -rw-r--r-- | kernel/irq/manage.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 4e461438e48..92be519eff2 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -137,16 +137,40 @@ EXPORT_SYMBOL(enable_irq); * @irq: interrupt to control * @on: enable/disable power management wakeup * - * Enable/disable power management wakeup mode + * Enable/disable power management wakeup mode, which is + * disabled by default. Enables and disables must match, + * just as they match for non-wakeup mode support. + * + * Wakeup mode lets this IRQ wake the system from sleep + * states like "suspend to RAM". */ int set_irq_wake(unsigned int irq, unsigned int on) { struct irq_desc *desc = irq_desc + irq; unsigned long flags; int ret = -ENXIO; + int (*set_wake)(unsigned, unsigned) = desc->chip->set_wake; + /* wakeup-capable irqs can be shared between drivers that + * don't need to have the same sleep mode behaviors. + */ spin_lock_irqsave(&desc->lock, flags); - if (desc->chip->set_wake) + if (on) { + if (desc->wake_depth++ == 0) + desc->status |= IRQ_WAKEUP; + else + set_wake = NULL; + } else { + if (desc->wake_depth == 0) { + printk(KERN_WARNING "Unbalanced IRQ %d " + "wake disable\n", irq); + WARN_ON(1); + } else if (--desc->wake_depth == 0) + desc->status &= ~IRQ_WAKEUP; + else + set_wake = NULL; + } + if (set_wake) ret = desc->chip->set_wake(irq, on); spin_unlock_irqrestore(&desc->lock, flags); return ret; |