So we can use irq_free_descs to clear allocated_irqs bits for
preserved irqs.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
kernel/irq/irqdesc.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index b1d6e51..da82457 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -169,6 +169,9 @@ static void free_desc(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
+ if (!desc)
+ return;
+
unregister_irq_proc(irq, desc);
mutex_lock(&sparse_irq_lock);
--
1.7.7
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