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-rw-r--r--kernel/irq/chip.c5
-rw-r--r--kernel/irq/irqdesc.c1
-rw-r--r--kernel/irq/manage.c52
-rw-r--r--kernel/irq/pm.c7
-rw-r--r--kernel/irq/resend.c7
5 files changed, 47 insertions, 25 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 6080f6bc8c3..fc275e4f629 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);
@@ -518,6 +520,7 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
out_unlock:
raw_spin_unlock(&desc->lock);
}
+EXPORT_SYMBOL(handle_edge_irq);
#ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
/**
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index d86e254b95e..192a302d6cf 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -112,6 +112,7 @@ struct irq_desc *irq_to_desc(unsigned int irq)
{
return radix_tree_lookup(&irq_desc_tree, irq);
}
+EXPORT_SYMBOL(irq_to_desc);
static void delete_irq_desc(unsigned int irq)
{
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 89a3ea82569..bb32326afe8 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:
@@ -1204,12 +1220,6 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
/* Found it - now remove it from the list of entries: */
*action_ptr = action->next;
- /* Currently used only by UML, might disappear one day: */
-#ifdef CONFIG_IRQ_RELEASE_METHOD
- if (desc->irq_data.chip->release)
- desc->irq_data.chip->release(irq, dev_id);
-#endif
-
/* If this was the last handler, shut down the IRQ line: */
if (!desc->action)
irq_shutdown(desc);
diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c
index 15e53b1766a..cb228bf2176 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 14dd5761e8c..6454db7b6a4 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) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-29 12:57:23 +0000