x86, microcode: Correct sysdev_add error path

When we encounter an error while initting the microcode driver on a CPU,
we must undo the previously added sysfs group.

Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 1cca374a2bac..87af68e0e1e1 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -417,8 +417,10 @@ static int mc_sysdev_add(struct sys_device *sys_dev)
         if (err)
                 return err;
 
-        if (microcode_init_cpu(cpu) == UCODE_ERROR)
-                err = -EINVAL;
+        if (microcode_init_cpu(cpu) == UCODE_ERROR) {
+                sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
+                return -EINVAL;
+        }
 
         return err;
 }