Pull irq fix from Ingo Molnar: "Fixes a core IRQ subsystem deadlock" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Prevent chip buslock deadlock
Unified · Split
| @@ -1434,6 +1434,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) · 1433 unmodified lines | |||
| 1434 | if (!desc) | 1434 | if (!desc) |
| 1435 | return NULL; | 1435 | return NULL; |
| 1436 | 1436 | ||
| 1437 | chip_bus_lock(desc); | ||
| 1437 | raw_spin_lock_irqsave(&desc->lock, flags); | 1438 | raw_spin_lock_irqsave(&desc->lock, flags); |
| 1438 | 1439 | ||
| 1439 | /* | 1440 | /* |
| @@ -1447,7 +1448,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) · 7 unmodified lines | |||
| 1447 | if (!action) { | 1448 | if (!action) { |
| 1448 | WARN(1, "Trying to free already-free IRQ %d\n", irq); | 1449 | WARN(1, "Trying to free already-free IRQ %d\n", irq); |
| 1449 | raw_spin_unlock_irqrestore(&desc->lock, flags); | 1450 | raw_spin_unlock_irqrestore(&desc->lock, flags); |
| 1450 | 1451 | chip_bus_sync_unlock(desc); | |
| 1451 | return NULL; | 1452 | return NULL; |
| 1452 | } | 1453 | } |
| 1453 | 1454 | ||
| @@ -1475,6 +1476,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) · 21 unmodified lines | |||
| 1475 | #endif | 1476 | #endif |
| 1476 | 1477 | ||
| 1477 | raw_spin_unlock_irqrestore(&desc->lock, flags); | 1478 | raw_spin_unlock_irqrestore(&desc->lock, flags); |
| 1479 | chip_bus_sync_unlock(desc); | ||
| 1478 | 1480 | ||
| 1479 | unregister_handler_proc(irq, action); | 1481 | unregister_handler_proc(irq, action); |
| 1480 | 1482 | ||
| @@ -1553,9 +1555,7 @@ void free_irq(unsigned int irq, void *dev_id) · 72 unmodified lines | |||
| 1553 | desc->affinity_notify = NULL; | 1555 | desc->affinity_notify = NULL; |
| 1554 | #endif | 1556 | #endif |
| 1555 | 1557 | ||
| 1556 | chip_bus_lock(desc); | ||
| 1557 | kfree(__free_irq(irq, dev_id)); | 1558 | kfree(__free_irq(irq, dev_id)); |
| 1558 | chip_bus_sync_unlock(desc); | ||
| 1559 | } | 1559 | } |
| 1560 | EXPORT_SYMBOL(free_irq); | 1560 | EXPORT_SYMBOL(free_irq); |
| 1561 | 1561 | ||