[PATCH] powerpc/powernv: Add a null pointer check in opal_event_init

[Kunwu Chan]

kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: 2717a33d6074 ("powerpc/opal-irqchip: Use interrupt names if present")
Signed-off-by: Kunwu Chan <chen...@kylinos.cn>
---
 arch/powerpc/platforms/powernv/opal-irqchip.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c 
b/arch/powerpc/platforms/powernv/opal-irqchip.c
index f9a7001dacb7..56a1f7ce78d2 100644
--- a/arch/powerpc/platforms/powernv/opal-irqchip.c
+++ b/arch/powerpc/platforms/powernv/opal-irqchip.c
@@ -275,6 +275,8 @@ int __init opal_event_init(void)
                else
                        name = kasprintf(GFP_KERNEL, "opal");
 
+               if (!name)
+                       continue;
                /* Install interrupt handler */
                rc = request_irq(r->start, opal_interrupt, r->flags & 
IRQD_TRIGGER_MASK,
                                 name, NULL);
-- 
2.34.1