| From | Yinghai Lu <> | Subject | [PATCH v5 03/33] genirq: Do not free unallocated irq descriptors | Date | Thu, 2 Jan 2014 16:05:35 -0800 |
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Hot-added interrupt controllers can reserve a range of interrupt numbers, but only allocate some of them. To simplify the release on hot-remove allow them to iterate over the reserved range, let the free_desc() code return early when the descriptor does not exist
-v2: changelog from tglx
Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- kernel/irq/irqdesc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 1166545..bbf0601 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -165,6 +165,9 @@ 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); -- 1.8.4
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