[PATCH] powerpc/83xx: Add a null pointer check to mcu_gpiochip_add

[Kunwu Chan]

kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure. Ensure the allocation was successful
by checking the pointer validity.

Cc: Kunwu Chan <kunwu.c...@hotmail.com>
Signed-off-by: Kunwu Chan <chen...@kylinos.cn>
---
 arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c 
b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
index 4d8fa9ed1a67..d1ae66eaa687 100644
--- a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
+++ b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
@@ -120,6 +120,8 @@ static int mcu_gpiochip_add(struct mcu *mcu)
 
        gc->owner = THIS_MODULE;
        gc->label = kasprintf(GFP_KERNEL, "%pfw", dev_fwnode(dev));
+       if (!gc->label)
+               return -ENOMEM;
        gc->can_sleep = 1;
        gc->ngpio = MCU_NUM_GPIO;
        gc->base = -1;
-- 
2.39.2