Commit-ID: b3d422329f2e061d66af4f933ef316e50e5edcac
Gitweb: http://git.kernel.org/tip/b3d422329f2e061d66af4f933ef316e50e5edcac
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sun, 27 Mar 2011 16:05:36 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sun, 27 Mar 2011 17:45:58 +0200
genirq: Add chip flag for restricting cpu_on/offline calls
Add a flag which indicates that the on/offline callback should only be
called on enabled interrupts.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
include/linux/irq.h | 3 +++
kernel/irq/chip.c | 10 ++++++----
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index c2a0c19..76e948f 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -348,11 +348,14 @@ struct irq_chip {
* IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
* IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
* IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
+ * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
+ * when irq enabled
*/
enum {
IRQCHIP_SET_TYPE_MASKED = (1 << 0),
IRQCHIP_EOI_IF_HANDLED = (1 << 1),
IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
+ IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
};
/* This include will go away once we isolated irq_desc usage to core code */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 44b16a1..9283d33 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -718,8 +718,9 @@ void irq_cpu_online(void)
raw_spin_lock_irqsave(&desc->lock, flags);
chip = irq_data_get_irq_chip(&desc->irq_data);
-
- if (chip && chip->irq_cpu_online)
+ if (chip && chip->irq_cpu_online &&
+ (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
+ !(desc->istate & IRQS_DISABLED)))
chip->irq_cpu_online(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);
@@ -747,8 +748,9 @@ void irq_cpu_offline(void)
raw_spin_lock_irqsave(&desc->lock, flags);
chip = irq_data_get_irq_chip(&desc->irq_data);
-
- if (chip && chip->irq_cpu_offline)
+ if (chip && chip->irq_cpu_offline &&
+ (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
+ !(desc->istate & IRQS_DISABLED)))
chip->irq_cpu_offline(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);
--
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