[PATCH] powerpc/pasemi: Add a null pointer check to the pas_setup_mce_regs

[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.

Signed-off-by: Kunwu Chan <chen...@kylinos.cn>
---
 arch/powerpc/platforms/pasemi/setup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/pasemi/setup.c 
b/arch/powerpc/platforms/pasemi/setup.c
index 0761d98e5be3..8f98f3b58888 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -165,6 +165,8 @@ static int __init pas_setup_mce_regs(void)
        while (dev && reg < MAX_MCE_REGS) {
                mce_regs[reg].name = kasprintf(GFP_KERNEL,
                                                "mc%d_mcdebug_errsta", reg);
+               if (!mce_regs[reg].name)
+                       return -ENOMEM;
                mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
                dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
                reg++;
-- 
2.39.2