[patch] ipc/mqueue: Add missing error code in init_mqueue_fs()

[Dan Carpenter]

We should propogate the error code here but we accidentally return
success.

Fixes: 946086abeddf ("mqueue: switch to on-demand creation of internal mount")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 89b5c53e0203..70423581dc92 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1610,8 +1610,10 @@ static int __init init_mqueue_fs(void)
                goto out_filesystem;
 
        m = kern_mount_data(&mqueue_fs_type, &init_ipc_ns);
-       if (IS_ERR(m))
+       if (IS_ERR(m)) {
+               error = PTR_ERR(m);
                goto out_filesystem;
+       }
        init_ipc_ns.mq_mnt = m;
        return 0;