Shared interrupts can be registered with handle_nested_irq(), but
currently only one of the registered handlers gets called.
The use of shared interrupts with handle_nested_irq() is probably rare,
but at least a case of a shared VBUS interrupt between USB PHY and
battery charger drivers for a PMIC makes sense.
Typically for_each_action_of_desc() gets called via handle_irq_event()
at _handle_irq_event_percpu(), but handle_nested_irq() is different
because of it's dummy irq_nested_primary_handler().
Let's fix the issue by calling the handler for all the entries in
the action list.
Fixes: 399b5da29b9f ("genirq: Support nested threaded irq handling")
Signed-off-by: Tony Lindgren <[email protected]>
---
kernel/irq/chip.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -348,9 +348,11 @@ void handle_nested_irq(unsigned int irq)
irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
raw_spin_unlock_irq(&desc->lock);
- action_ret = action->thread_fn(action->irq, action->dev_id);
- if (!noirqdebug)
- note_interrupt(desc, action_ret);
+ for_each_action_of_desc(desc, action) {
+ action_ret = action->thread_fn(action->irq, action->dev_id);
+ if (!noirqdebug)
+ note_interrupt(desc, action_ret);
+ }
raw_spin_lock_irq(&desc->lock);
irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
--
2.11.1
