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irqdomain: Check for NULL function pointer in irq_domain_free_irqs_hierarchy()

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A follow-on patch will call irq_domain_free_irqs_hierarchy() when the
free() function pointer may be NULL.

Add a NULL pointer check to handle this new use case.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Link: http://lkml.kernel.org/r/1503017616-3252-5-git-send-email-david.daney@cavium.com
This commit is contained in:
David Daney 2017-08-17 17:53:33 -07:00 committed by Thomas Gleixner
parent b526adfe1b
commit 0d12ec075a
1 changed files with 2 additions and 1 deletions
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3
kernel/irq/irqdomain.c
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@ -1362,7 +1362,8 @@ static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
unsigned int irq_base,
unsigned int nr_irqs)
{
domain->ops->free(domain, irq_base, nr_irqs);
if (domain->ops->free)
domain->ops->free(domain, irq_base, nr_irqs);
}
int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,