lkml.org 
[lkml]   [2011]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch 14/75] genirq: Consolidate startup/shutdown of interrupts
Aside of duplicated code some of the startup/shutdown sites do not
handle the MASKED/DISABLED flags and the depth field at all. Move that
to a helper function and take care of it there.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.787481468@linutronix.de>
---
kernel/irq/autoprobe.c | 10 +++++-----
kernel/irq/chip.c | 37 ++++++++++++++++++++-----------------
kernel/irq/internals.h | 3 +++
kernel/irq/manage.c | 14 +++++---------
4 files changed, 33 insertions(+), 31 deletions(-)
Index: linux-2.6-tip/kernel/irq/autoprobe.c
===================================================================
--- linux-2.6-tip.orig/kernel/irq/autoprobe.c
+++ linux-2.6-tip/kernel/irq/autoprobe.c
@@ -60,7 +60,7 @@ unsigned long probe_irq_on(void)
if (desc->irq_data.chip->irq_set_type)
desc->irq_data.chip->irq_set_type(&desc->irq_data,
IRQ_TYPE_PROBE);
- desc->irq_data.chip->irq_startup(&desc->irq_data);
+ irq_startup(desc);
}
raw_spin_unlock_irq(&desc->lock);
}
@@ -77,7 +77,7 @@ unsigned long probe_irq_on(void)
raw_spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
- if (desc->irq_data.chip->irq_startup(&desc->irq_data))
+ if (irq_startup(desc))
desc->status |= IRQ_PENDING;
}
raw_spin_unlock_irq(&desc->lock);
@@ -99,7 +99,7 @@ unsigned long probe_irq_on(void)
/* It triggered already - consider it spurious. */
if (!(status & IRQ_WAITING)) {
desc->status = status & ~IRQ_AUTODETECT;
- desc->irq_data.chip->irq_shutdown(&desc->irq_data);
+ irq_shutdown(desc);
} else
if (i < 32)
mask |= 1 << i;
@@ -138,7 +138,7 @@ unsigned int probe_irq_mask(unsigned lon
mask |= 1 << i;

desc->status = status & ~IRQ_AUTODETECT;
- desc->irq_data.chip->irq_shutdown(&desc->irq_data);
+ irq_shutdown(desc);
}
raw_spin_unlock_irq(&desc->lock);
}
@@ -182,7 +182,7 @@ int probe_irq_off(unsigned long val)
nr_of_irqs++;
}
desc->status = status & ~IRQ_AUTODETECT;
- desc->irq_data.chip->irq_shutdown(&desc->irq_data);
+ irq_shutdown(desc);
}
raw_spin_unlock_irq(&desc->lock);
}
Index: linux-2.6-tip/kernel/irq/chip.c
===================================================================
--- linux-2.6-tip.orig/kernel/irq/chip.c
+++ linux-2.6-tip/kernel/irq/chip.c
@@ -190,6 +190,25 @@ void set_irq_nested_thread(unsigned int
}
EXPORT_SYMBOL_GPL(set_irq_nested_thread);

+int irq_startup(struct irq_desc *desc)
+{
+ desc->status &= ~(IRQ_MASKED | IRQ_DISABLED);
+ desc->depth = 0;
+
+ if (desc->irq_data.chip->irq_startup)
+ return desc->irq_data.chip->irq_startup(&desc->irq_data);
+
+ desc->irq_data.chip->irq_enable(&desc->irq_data);
+ return 0;
+}
+
+void irq_shutdown(struct irq_desc *desc)
+{
+ desc->status |= IRQ_MASKED | IRQ_DISABLED;
+ desc->depth = 1;
+ desc->irq_data.chip->irq_shutdown(&desc->irq_data);
+}
+
/*
* default enable function
*/
@@ -209,17 +228,6 @@ static void default_disable(struct irq_d
}

/*
- * default startup function
- */
-static unsigned int default_startup(struct irq_data *data)
-{
- struct irq_desc *desc = irq_data_to_desc(data);
-
- desc->irq_data.chip->irq_enable(data);
- return 0;
-}
-
-/*
* default shutdown function
*/
static void default_shutdown(struct irq_data *data)
@@ -227,7 +235,6 @@ static void default_shutdown(struct irq_
struct irq_desc *desc = irq_data_to_desc(data);

desc->irq_data.chip->irq_mask(&desc->irq_data);
- desc->status |= IRQ_MASKED;
}

#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
@@ -335,8 +342,6 @@ void irq_chip_set_defaults(struct irq_ch
chip->irq_enable = default_enable;
if (!chip->irq_disable)
chip->irq_disable = default_disable;
- if (!chip->irq_startup)
- chip->irq_startup = default_startup;
/*
* We use chip->irq_disable, when the user provided its own. When
* we have default_disable set for chip->irq_disable, then we need
@@ -745,10 +750,8 @@ __set_irq_handler(unsigned int irq, irq_
desc->name = name;

if (handle != handle_bad_irq && is_chained) {
- desc->status &= ~IRQ_DISABLED;
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
- desc->depth = 0;
- desc->irq_data.chip->irq_startup(&desc->irq_data);
+ irq_startup(desc);
}
raw_spin_unlock_irqrestore(&desc->lock, flags);
chip_bus_sync_unlock(desc);
Index: linux-2.6-tip/kernel/irq/internals.h
===================================================================
--- linux-2.6-tip.orig/kernel/irq/internals.h
+++ linux-2.6-tip/kernel/irq/internals.h
@@ -32,6 +32,9 @@ extern int __irq_set_trigger(struct irq_
extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);

+extern int irq_startup(struct irq_desc *desc);
+extern void irq_shutdown(struct irq_desc *desc);
+
extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);

/* Resending of interrupts :*/
Index: linux-2.6-tip/kernel/irq/manage.c
===================================================================
--- linux-2.6-tip.orig/kernel/irq/manage.c
+++ linux-2.6-tip/kernel/irq/manage.c
@@ -912,11 +912,9 @@ __setup_irq(unsigned int irq, struct irq
if (new->flags & IRQF_ONESHOT)
desc->status |= IRQ_ONESHOT;

- if (!(desc->status & IRQ_NOAUTOEN)) {
- desc->depth = 0;
- desc->status &= ~IRQ_DISABLED;
- desc->irq_data.chip->irq_startup(&desc->irq_data);
- } else
+ if (!(desc->status & IRQ_NOAUTOEN))
+ irq_startup(desc);
+ else
/* Undo nested disables: */
desc->depth = 1;

@@ -1056,10 +1054,8 @@ static struct irqaction *__free_irq(unsi
#endif

/* If this was the last handler, shut down the IRQ line: */
- if (!desc->action) {
- desc->status |= IRQ_DISABLED;
- desc->irq_data.chip->irq_shutdown(&desc->irq_data);
- }
+ if (!desc->action)
+ irq_shutdown(desc);

#ifdef CONFIG_SMP
/* make sure affinity_hint is cleaned up */



\
 
 \ /
  Last update: 2011-02-11 00:39    [from the cache]
©2003-2011 Jasper Spaans