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kernel/irq/irqdomain.c: before use 'irq_data', need check it whether valid.

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Since irq_data may be NULL, if so, we WARN_ON(), and continue, 'hwirq'
which related with 'irq_data' has to initialize later, or it will cause
issue.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Chen Gang 2013-05-14 19:02:45 +08:00 committed by Grant Likely
parent 346dbb79ea
commit 275e31b10c
1 changed files with 2 additions and 1 deletions
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3
kernel/irq/irqdomain.c
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@ -398,11 +398,12 @@ static void irq_domain_disassociate_many(struct irq_domain *domain,
while (count--) {
int irq = irq_base + count;
struct irq_data *irq_data = irq_get_irq_data(irq);
irq_hw_number_t hwirq = irq_data->hwirq;
irq_hw_number_t hwirq;
if (WARN_ON(!irq_data || irq_data->domain != domain))
continue;
hwirq = irq_data->hwirq;
irq_set_status_flags(irq, IRQ_NOREQUEST);
/* remove chip and handler */