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>

diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 1cca374a2bacc8f1f5275847ef4d4cd2787c0545..87af68e0e1e1458a00d90d7e95e6755a4a332aa4 100644 (file)
--- 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;
 }