diff options
| -rw-r--r-- | include/linux/irq.h | 1 | ||||
| -rw-r--r-- | kernel/irq/autoprobe.c | 29 | ||||
| -rw-r--r-- | kernel/irq/internals.h | 15 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 3 |
4 files changed, 27 insertions, 21 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index e32b64ccdc89..d1f9c352cd1b 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -54,7 +54,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ #define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ #define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ -#define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */ #define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */ #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 08947cb61725..916e56e10a2e 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -32,7 +32,6 @@ unsigned long probe_irq_on(void) { struct irq_desc *desc; unsigned long mask = 0; - unsigned int status; int i; /* @@ -76,7 +75,8 @@ unsigned long probe_irq_on(void) for_each_irq_desc_reverse(i, desc) { raw_spin_lock_irq(&desc->lock); if (!desc->action && !(desc->status & IRQ_NOPROBE)) { - desc->status |= IRQ_AUTODETECT | IRQ_WAITING; + desc->istate |= IRQS_AUTODETECT; + desc->status |= IRQ_WAITING; if (irq_startup(desc)) desc->status |= IRQ_PENDING; } @@ -93,12 +93,11 @@ unsigned long probe_irq_on(void) */ for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); - status = desc->status; - if (status & IRQ_AUTODETECT) { + if (desc->istate & IRQS_AUTODETECT) { /* It triggered already - consider it spurious. */ - if (!(status & IRQ_WAITING)) { - desc->status = status & ~IRQ_AUTODETECT; + if (!(desc->status & IRQ_WAITING)) { + desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } else if (i < 32) @@ -125,19 +124,17 @@ EXPORT_SYMBOL(probe_irq_on); */ unsigned int probe_irq_mask(unsigned long val) { - unsigned int status, mask = 0; + unsigned int mask = 0; struct irq_desc *desc; int i; for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); - status = desc->status; - - if (status & IRQ_AUTODETECT) { - if (i < 16 && !(status & IRQ_WAITING)) + if (desc->istate & IRQS_AUTODETECT) { + if (i < 16 && !(desc->status & IRQ_WAITING)) mask |= 1 << i; - desc->status = status & ~IRQ_AUTODETECT; + desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } raw_spin_unlock_irq(&desc->lock); @@ -169,19 +166,17 @@ int probe_irq_off(unsigned long val) { int i, irq_found = 0, nr_of_irqs = 0; struct irq_desc *desc; - unsigned int status; for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); - status = desc->status; - if (status & IRQ_AUTODETECT) { - if (!(status & IRQ_WAITING)) { + if (desc->istate & IRQS_AUTODETECT) { + if (!(desc->status & IRQ_WAITING)) { if (!nr_of_irqs) irq_found = i; nr_of_irqs++; } - desc->status = status & ~IRQ_AUTODETECT; + desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } raw_spin_unlock_irq(&desc->lock); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 8f200310a952..7ffd4f439b92 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -33,6 +33,15 @@ enum { IRQTF_AFFINITY, }; +/* + * Bit masks for desc->state + * + * IRQS_AUTODETECT - autodetection in progress + */ +enum { + IRQS_AUTODETECT = 0x00000001, +}; + #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) /* Set default functions for irq_chip structures: */ @@ -98,6 +107,7 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc) #include <linux/kallsyms.h> #define P(f) if (desc->status & f) printk("%14s set\n", #f) +#define PS(f) if (desc->istate & f) printk("%14s set\n", #f) static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) { @@ -117,7 +127,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_DISABLED); P(IRQ_PENDING); P(IRQ_REPLAY); - P(IRQ_AUTODETECT); P(IRQ_WAITING); P(IRQ_LEVEL); P(IRQ_MASKED); @@ -127,7 +136,9 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_NOPROBE); P(IRQ_NOREQUEST); P(IRQ_NOAUTOEN); + + PS(IRQS_AUTODETECT); } #undef P - +#undef PS diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index dd4e5c21b9e7..abe852c9449d 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -897,8 +897,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_PER_CPU; #endif - desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING | IRQ_ONESHOT | + desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT | IRQ_INPROGRESS | IRQ_SPURIOUS_DISABLED); + desc->istate &= ~IRQS_AUTODETECT; if (new->flags & IRQF_ONESHOT) desc->status |= IRQ_ONESHOT; |