powerpc/powernv: Add a null pointer check in opal_event_init()

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 <chentao@kylinos.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231127030755.1546750-1-chentao@kylinos.cn

diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c b/arch/powerpc/platforms/powernv/opal-irqchip.c
index f9a7001dacb7a1eacb9e8da60eba587e3ea0d44d..56a1f7ce78d2c7bb16d6709a23ab35ac1c0b8108 100644 (file)
--- 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);