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Commit 275e31b1 authored by Chen Gang's avatar Chen Gang Committed by Grant Likely
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kernel/irq/irqdomain.c: before use 'irq_data', need check it whether valid. 



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: default avatarChen Gang <gang.chen@asianux.com>
Signed-off-by: default avatarGrant Likely <grant.likely@linaro.org>
parent 346dbb79

kernel/irq/irqdomain.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -398,11 +398,12 @@ static void irq_domain_disassociate_many(struct irq_domain *domain, 
	while (count--) {

	while (count--) {

		int irq = irq_base + count;

		int irq = irq_base + count;

		struct irq_data *irq_data = irq_get_irq_data(irq);

		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))

		if (WARN_ON(!irq_data || irq_data->domain != domain))

			continue;

			continue;





		hwirq = irq_data->hwirq;

		irq_set_status_flags(irq, IRQ_NOREQUEST);

		irq_set_status_flags(irq, IRQ_NOREQUEST);





		/* remove chip and handler */

		/* remove chip and handler */