[PATCH] kernel: profile: fix error return code of create_proc_profile()

[Jia-Ju Bai]

When proc_create() returns NULL to entry, no error return code of
create_proc_profile() is assigned.
To fix this bug, err is assigned with -ENOMEM in this case.

Fixes: e722d8daafb9 ("profile: Convert to hotplug state machine")
Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
 kernel/profile.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/profile.c b/kernel/profile.c
index 6f69a4195d56..65bf03bb8a5e 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -549,8 +549,10 @@ int __ref create_proc_profile(void)
 #endif
        entry = proc_create("profile", S_IWUSR | S_IRUGO,
                            NULL, &profile_proc_ops);
-       if (!entry)
+       if (!entry) {
+               err = -ENOMEM;
                goto err_state_onl;
+       }
        proc_set_size(entry, (1 + prof_len) * sizeof(atomic_t));
 
        return err;
-- 
2.17.1