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authorDavid Daney <david.daney@cavium.com>2017-08-18 02:53:33 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-08-18 11:21:42 +0200
commit0d12ec075a18f53e6f58ec95a4f534da2641bf9b (patch)
treeb1a2abb17c20a253724ae65a62c1ee7017a4b3b3 /kernel/irq/irqdomain.c
parentirqdomain: Factor out code to add and remove items to and from the revmap (diff)
downloadlinux-0d12ec075a18f53e6f58ec95a4f534da2641bf9b.tar.xz
linux-0d12ec075a18f53e6f58ec95a4f534da2641bf9b.zip
irqdomain: Check for NULL function pointer in irq_domain_free_irqs_hierarchy()
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
Diffstat (limited to '')
-rw-r--r--kernel/irq/irqdomain.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 2093b88ce9b7..24fda7557cef 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -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,