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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-22 03:33:19 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-22 03:33:19 (GMT) |
commit | 471368557a734c6c486ee757952c902b36e7fd01 (patch) | |
tree | f192a77d2cb70b1d135e7be62418806e8c590a3e /kernel | |
parent | cb60e3e65c1b96a4d6444a7a13dc7dd48bc15a2b (diff) | |
parent | e0d8ffd1df44518cb9ac9b1807d1f13cc100fc2f (diff) | |
download | linux-fsl-qoriq-471368557a734c6c486ee757952c902b36e7fd01.tar.xz |
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core irq changes from Ingo Molnar:
"A collection of small fixes."
By Thomas Gleixner
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
hexagon: Remove select of not longer existing Kconfig switches
arm: Select core options instead of redefining them
genirq: Do not consider disabled wakeup irqs
genirq: Allow check_wakeup_irqs to notice level-triggered interrupts
genirq: Be more informative on irq type mismatch
genirq: Reject bogus threaded irq requests
genirq: Streamline irq_action
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/irq/chip.c | 4 | ||||
-rw-r--r-- | kernel/irq/manage.c | 46 | ||||
-rw-r--r-- | kernel/irq/pm.c | 7 | ||||
-rw-r--r-- | kernel/irq/resend.c | 7 |
4 files changed, 45 insertions, 19 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 3914c1e..fc275e4 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -379,8 +379,10 @@ 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 || irqd_irq_disabled(&desc->irq_data))) + if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { + desc->istate |= IRQS_PENDING; goto out_unlock; + } handle_irq_event(desc); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 89a3ea8..585f638 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -565,8 +565,8 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, * IRQF_TRIGGER_* but the PIC does not support multiple * flow-types? */ - pr_debug("No set_type function for IRQ %d (%s)\n", irq, - chip ? (chip->name ? : "unknown") : "unknown"); + pr_debug("genirq: No set_type function for IRQ %d (%s)\n", irq, + chip ? (chip->name ? : "unknown") : "unknown"); return 0; } @@ -600,7 +600,7 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, ret = 0; break; default: - pr_err("setting trigger mode %lu for irq %u failed (%pF)\n", + pr_err("genirq: Setting trigger mode %lu for irq %u failed (%pF)\n", flags, irq, chip->irq_set_type); } if (unmask) @@ -837,8 +837,7 @@ void exit_irq_thread(void) action = kthread_data(tsk); - printk(KERN_ERR - "exiting task \"%s\" (%d) is an active IRQ thread (irq %d)\n", + pr_err("genirq: exiting task \"%s\" (%d) is an active IRQ thread (irq %d)\n", tsk->comm ? tsk->comm : "", tsk->pid, action->irq); desc = irq_to_desc(action->irq); @@ -878,7 +877,6 @@ static int __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) { struct irqaction *old, **old_ptr; - const char *old_name = NULL; unsigned long flags, thread_mask = 0; int ret, nested, shared = 0; cpumask_var_t mask; @@ -972,10 +970,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) */ if (!((old->flags & new->flags) & IRQF_SHARED) || ((old->flags ^ new->flags) & IRQF_TRIGGER_MASK) || - ((old->flags ^ new->flags) & IRQF_ONESHOT)) { - old_name = old->name; + ((old->flags ^ new->flags) & IRQF_ONESHOT)) goto mismatch; - } /* All handlers must agree on per-cpuness */ if ((old->flags & IRQF_PERCPU) != @@ -1031,6 +1027,27 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) * all existing action->thread_mask bits. */ new->thread_mask = 1 << ffz(thread_mask); + + } else if (new->handler == irq_default_primary_handler) { + /* + * The interrupt was requested with handler = NULL, so + * we use the default primary handler for it. But it + * does not have the oneshot flag set. In combination + * with level interrupts this is deadly, because the + * default primary handler just wakes the thread, then + * the irq lines is reenabled, but the device still + * has the level irq asserted. Rinse and repeat.... + * + * While this works for edge type interrupts, we play + * it safe and reject unconditionally because we can't + * say for sure which type this interrupt really + * has. The type flags are unreliable as the + * underlying chip implementation can override them. + */ + pr_err("genirq: Threaded irq requested with handler=NULL and !ONESHOT for irq %d\n", + irq); + ret = -EINVAL; + goto out_mask; } if (!shared) { @@ -1078,7 +1095,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) if (nmsk != omsk) /* hope the handler works with current trigger mode */ - pr_warning("IRQ %d uses trigger mode %u; requested %u\n", + pr_warning("genirq: irq %d uses trigger mode %u; requested %u\n", irq, nmsk, omsk); } @@ -1115,14 +1132,13 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) return 0; mismatch: -#ifdef CONFIG_DEBUG_SHIRQ if (!(new->flags & IRQF_PROBE_SHARED)) { - printk(KERN_ERR "IRQ handler type mismatch for IRQ %d\n", irq); - if (old_name) - printk(KERN_ERR "current handler: %s\n", old_name); + pr_err("genirq: Flags mismatch irq %d. %08x (%s) vs. %08x (%s)\n", + irq, new->flags, new->name, old->flags, old->name); +#ifdef CONFIG_DEBUG_SHIRQ dump_stack(); - } #endif + } ret = -EBUSY; out_mask: diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index 15e53b1..cb228bf 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -103,8 +103,13 @@ int check_wakeup_irqs(void) int irq; for_each_irq_desc(irq, desc) { + /* + * Only interrupts which are marked as wakeup source + * and have not been disabled before the suspend check + * can abort suspend. + */ if (irqd_is_wakeup_set(&desc->irq_data)) { - if (desc->istate & IRQS_PENDING) + if (desc->depth == 1 && desc->istate & IRQS_PENDING) return -EBUSY; continue; } diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 14dd576..6454db7 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -58,10 +58,13 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq) /* * We do not resend level type interrupts. Level type * interrupts are resent by hardware when they are still - * active. + * active. Clear the pending bit so suspend/resume does not + * get confused. */ - if (irq_settings_is_level(desc)) + if (irq_settings_is_level(desc)) { + desc->istate &= ~IRQS_PENDING; return; + } if (desc->istate & IRQS_REPLAY) return; if (desc->istate & IRQS_PENDING) { |