summaryrefslogtreecommitdiffstats
path: root/kernel/irq/chip.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/irq/chip.c')
-rw-r--r--kernel/irq/chip.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 4a0952d9458b..54105bdfe20d 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -462,9 +462,18 @@ __set_irq_handler(unsigned int irq,
if (!handle)
handle = handle_bad_irq;
- if (is_chained && desc->chip == &no_irq_chip)
- printk(KERN_WARNING "Trying to install "
- "chained interrupt type for IRQ%d\n", irq);
+ if (desc->chip == &no_irq_chip) {
+ printk(KERN_WARNING "Trying to install %sinterrupt handler "
+ "for IRQ%d\n", is_chained ? "chained " : " ", irq);
+ /*
+ * Some ARM implementations install a handler for really dumb
+ * interrupt hardware without setting an irq_chip. This worked
+ * with the ARM no_irq_chip but the check in setup_irq would
+ * prevent us to setup the interrupt at all. Switch it to
+ * dummy_irq_chip for easy transition.
+ */
+ desc->chip = &dummy_irq_chip;
+ }
spin_lock_irqsave(&desc->lock, flags);