genirq: Prepare proc for real sparse irq support
/proc/irq never removes any entries, but when irq descriptors can be
freed for real this is necessary. Otherwise we'd reference a freed
descriptor in /proc/irq/N
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 4eea48b..6312a2c 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -205,6 +205,8 @@
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ unregister_irq_proc(irq, desc);
+
raw_spin_lock_irqsave(&sparse_irq_lock, flags);
delete_irq_desc(irq);
raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);