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 <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Marc Zyngier <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Alexandre Courbot <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions