Commit-ID: c1594b77e46124bb462f961e536120e471c67446
Gitweb: http://git.kernel.org/tip/c1594b77e46124bb462f961e536120e471c67446
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Mon, 7 Feb 2011 22:11:30 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sat, 19 Feb 2011 12:58:17 +0100
genirq: Move IRQ_DISABLED to core
Keep status in sync until all abusers are fixed.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
include/linux/irq.h | 4 ++--
kernel/irq/chip.c | 48 +++++++++++++++++++++++++++++++-----------------
kernel/irq/compat.h | 12 ++++++++++++
kernel/irq/internals.h | 4 +++-
kernel/irq/irqdesc.c | 2 ++
kernel/irq/manage.c | 4 ++--
kernel/irq/migration.c | 2 +-
kernel/irq/settings.h | 2 ++
kernel/irq/spurious.c | 4 ++--
9 files changed, 57 insertions(+), 25 deletions(-)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index c38dbd5..32efca7 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -55,9 +55,9 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_INPROGRESS 0x00000100 /* DEPRECATED */
#define IRQ_REPLAY 0x00000200 /* DEPRECATED */
#define IRQ_WAITING 0x00000400 /* DEPRECATED */
+#define IRQ_DISABLED 0x00000800 /* DEPRECATED */
#endif
-#define IRQ_DISABLED 0x00000800 /* IRQ disabled - do not enter! */
#define IRQ_PENDING 0x00001000 /* IRQ pending - replay on enable */
#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */
@@ -231,7 +231,7 @@ struct irq_chip {
# define ARCH_IRQ_INIT_FLAGS 0
#endif
-#define IRQ_DEFAULT_INIT_FLAGS (IRQ_DISABLED | ARCH_IRQ_INIT_FLAGS)
+#define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
struct irqaction;
extern int setup_irq(unsigned int irq, struct irqaction *new);
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 59ae145..527df7a 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -164,9 +164,21 @@ struct irq_data *irq_get_irq_data(unsigned int irq)
}
EXPORT_SYMBOL_GPL(irq_get_irq_data);
+static void irq_state_clr_disabled(struct irq_desc *desc)
+{
+ desc->istate &= ~IRQS_DISABLED;
+ irq_compat_clr_disabled(desc);
+}
+
+static void irq_state_set_disabled(struct irq_desc *desc)
+{
+ desc->istate |= IRQS_DISABLED;
+ irq_compat_set_disabled(desc);
+}
+
int irq_startup(struct irq_desc *desc)
{
- desc->status &= ~IRQ_DISABLED;
+ irq_state_clr_disabled(desc);
desc->depth = 0;
if (desc->irq_data.chip->irq_startup) {
@@ -181,7 +193,7 @@ int irq_startup(struct irq_desc *desc)
void irq_shutdown(struct irq_desc *desc)
{
- desc->status |= IRQ_DISABLED;
+ irq_state_set_disabled(desc);
desc->depth = 1;
if (desc->irq_data.chip->irq_shutdown)
desc->irq_data.chip->irq_shutdown(&desc->irq_data);
@@ -194,7 +206,7 @@ void irq_shutdown(struct irq_desc *desc)
void irq_enable(struct irq_desc *desc)
{
- desc->status &= ~IRQ_DISABLED;
+ irq_state_clr_disabled(desc);
if (desc->irq_data.chip->irq_enable)
desc->irq_data.chip->irq_enable(&desc->irq_data);
else
@@ -204,7 +216,7 @@ void irq_enable(struct irq_desc *desc)
void irq_disable(struct irq_desc *desc)
{
- desc->status |= IRQ_DISABLED;
+ irq_state_set_disabled(desc);
if (desc->irq_data.chip->irq_disable) {
desc->irq_data.chip->irq_disable(&desc->irq_data);
desc->status |= IRQ_MASKED;
@@ -380,7 +392,7 @@ void handle_nested_irq(unsigned int irq)
kstat_incr_irqs_this_cpu(irq, desc);
action = desc->action;
- if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+ if (unlikely(!action || (desc->istate & IRQS_DISABLED)))
goto out_unlock;
irq_compat_set_progress(desc);
@@ -431,7 +443,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
kstat_incr_irqs_this_cpu(irq, desc);
- if (unlikely(!desc->action || (desc->status & IRQ_DISABLED)))
+ if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED)))
goto out_unlock;
handle_irq_event(desc);
@@ -467,12 +479,12 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
* If its disabled or no action available
* keep it masked and get out of here
*/
- if (unlikely(!desc->action || (desc->status & IRQ_DISABLED)))
+ if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED)))
goto out_unlock;
handle_irq_event(desc);
- if (!(desc->status & IRQ_DISABLED) && !(desc->istate & IRQS_ONESHOT))
+ if (!(desc->istate & (IRQS_DISABLED | IRQS_ONESHOT)))
unmask_irq(desc);
out_unlock:
raw_spin_unlock(&desc->lock);
@@ -505,7 +517,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
* If its disabled or no action available
* then mask it and get out of here:
*/
- if (unlikely(!desc->action || (desc->status & IRQ_DISABLED))) {
+ if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) {
desc->status |= IRQ_PENDING;
mask_irq(desc);
goto out;
@@ -543,8 +555,8 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
* we shouldn't process the IRQ. Mark it pending, handle
* the necessary masking and go out
*/
- if (unlikely((desc->istate & (IRQS_INPROGRESS) ||
- (desc->status & IRQ_DISABLED) || !desc->action))) {
+ if (unlikely((desc->istate & (IRQS_DISABLED | IRQS_INPROGRESS) ||
+ !desc->action))) {
if (!irq_check_poll(desc)) {
desc->status |= IRQ_PENDING;
mask_ack_irq(desc);
@@ -567,15 +579,16 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
* one, we could have masked the irq.
* Renable it, if it was not disabled in meantime.
*/
- if (unlikely((desc->status &
- (IRQ_PENDING | IRQ_MASKED | IRQ_DISABLED)) ==
- (IRQ_PENDING | IRQ_MASKED))) {
- unmask_irq(desc);
+ if (unlikely(desc->status & IRQ_PENDING)) {
+ if (!(desc->istate & IRQS_DISABLED) &&
+ (desc->status & IRQ_MASKED))
+ unmask_irq(desc);
}
handle_irq_event(desc);
- } while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING);
+ } while ((desc->status & IRQ_PENDING) &&
+ !(desc->istate & IRQS_DISABLED));
out_unlock:
raw_spin_unlock(&desc->lock);
@@ -639,7 +652,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
if (handle == handle_bad_irq) {
if (desc->irq_data.chip != &no_irq_chip)
mask_ack_irq(desc);
- desc->status |= IRQ_DISABLED;
+ irq_compat_set_disabled(desc);
+ desc->istate |= IRQS_DISABLED;
desc->depth = 1;
}
desc->handle_irq = handle;
diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h
index aac6e40..bc0c2a5 100644
--- a/kernel/irq/compat.h
+++ b/kernel/irq/compat.h
@@ -11,7 +11,19 @@ static inline void irq_compat_clr_progress(struct irq_desc *desc)
{
desc->status &= ~IRQ_INPROGRESS;
}
+static inline void irq_compat_set_disabled(struct irq_desc *desc)
+{
+ desc->status |= IRQ_DISABLED;
+}
+
+static inline void irq_compat_clr_disabled(struct irq_desc *desc)
+{
+ desc->status &= ~IRQ_DISABLED;
+}
#else
static inline void irq_compat_set_progress(struct irq_desc *desc) { }
static inline void irq_compat_clr_progress(struct irq_desc *desc) { }
+static inline void irq_compat_set_disabled(struct irq_desc *desc) { }
+static inline void irq_compat_clr_disabled(struct irq_desc *desc) { }
#endif
+
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 5403753..919d2dd 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -45,6 +45,7 @@ enum {
* IRQS_ONESHOT - irq is not unmasked in primary handler
* IRQS_REPLAY - irq is replayed
* IRQS_WAITING - irq is waiting
+ * IRQS_DISABLED - irq is disabled
*/
enum {
IRQS_AUTODETECT = 0x00000001,
@@ -54,6 +55,7 @@ enum {
IRQS_ONESHOT = 0x00000020,
IRQS_REPLAY = 0x00000040,
IRQS_WAITING = 0x00000080,
+ IRQS_DISABLED = 0x00000100,
};
#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
@@ -137,7 +139,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
print_symbol("%s\n", (unsigned long)desc->action->handler);
}
- P(IRQ_DISABLED);
P(IRQ_PENDING);
P(IRQ_LEVEL);
P(IRQ_MASKED);
@@ -152,6 +153,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
PS(IRQS_INPROGRESS);
PS(IRQS_REPLAY);
PS(IRQS_WAITING);
+ PS(IRQS_DISABLED);
}
#undef P
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 8b87f2c..78866d0 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -80,6 +80,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
desc->irq_data.handler_data = NULL;
desc->irq_data.msi_desc = NULL;
desc->status = _IRQ_DEFAULT_INIT_FLAGS;
+ desc->istate = IRQS_DISABLED;
desc->handle_irq = handle_bad_irq;
desc->depth = 1;
desc->irq_count = 0;
@@ -247,6 +248,7 @@ int __init early_irq_init(void)
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = {
.status = _IRQ_DEFAULT_INIT_FLAGS,
+ .istate = IRQS_DISABLED,
.handle_irq = handle_bad_irq,
.depth = 1,
.lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 7971df5..77ff275 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -646,7 +646,7 @@ again:
goto again;
}
- if (!(desc->status & IRQ_DISABLED) && (desc->status & IRQ_MASKED)) {
+ if (!(desc->istate & IRQS_DISABLED) && (desc->status & IRQ_MASKED)) {
desc->status &= ~IRQ_MASKED;
desc->irq_data.chip->irq_unmask(&desc->irq_data);
}
@@ -709,7 +709,7 @@ static int irq_thread(void *data)
atomic_inc(&desc->threads_active);
raw_spin_lock_irq(&desc->lock);
- if (unlikely(desc->status & IRQ_DISABLED)) {
+ if (unlikely(desc->istate & IRQS_DISABLED)) {
/*
* CHECKME: We might need a dedicated
* IRQ_THREAD_PENDING flag here, which
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 441fd62..8c68cb8 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -61,7 +61,7 @@ void move_native_irq(int irq)
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
return;
- if (unlikely(desc->status & IRQ_DISABLED))
+ if (unlikely(desc->istate & IRQS_DISABLED))
return;
/*
diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h
index 2e7d08f..5e3411c 100644
--- a/kernel/irq/settings.h
+++ b/kernel/irq/settings.h
@@ -12,3 +12,5 @@ enum {
#define IRQ_REPLAY GOT_YOU_MORON
#undef IRQ_WAITING
#define IRQ_WAITING GOT_YOU_MORON
+#undef IRQ_DISABLED
+#define IRQ_DISABLED GOT_YOU_MORON
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index 5150483..367614f 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -50,7 +50,7 @@ bool irq_wait_for_poll(struct irq_desc *desc)
raw_spin_lock(&desc->lock);
} while (desc->istate & IRQS_INPROGRESS);
/* Might have been disabled in meantime */
- return !(desc->status & IRQ_DISABLED) && desc->action;
+ return !(desc->istate & IRQS_DISABLED) && desc->action;
#else
return false;
#endif
@@ -75,7 +75,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force)
* Do not poll disabled interrupts unless the spurious
* disabled poller asks explicitely.
*/
- if ((desc->status & IRQ_DISABLED) && !force)
+ if ((desc->istate & IRQS_DISABLED) && !force)
goto out;
/*
--
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