s390/qeth: handle failure on workqueue creation

Creating the global workqueue during driver init may fail, deal with it.
Also, destroy the created workqueue on any subsequent error.

Fixes: 0f54761d167f ("qeth: Support VEPA mode")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 5ec47c6..9a08b54 100644 (file)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -6540,10 +6540,14 @@ static int __init qeth_core_init(void)
        mutex_init(&qeth_mod_mutex);
 
        qeth_wq = create_singlethread_workqueue("qeth_wq");
+       if (!qeth_wq) {
+               rc = -ENOMEM;
+               goto out_err;
+       }
 
        rc = qeth_register_dbf_views();
        if (rc)
-               goto out_err;
+               goto dbf_err;
        qeth_core_root_dev = root_device_register("qeth");
        rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
        if (rc)
@@ -6580,6 +6584,8 @@ slab_err:
        root_device_unregister(qeth_core_root_dev);
 register_err:
        qeth_unregister_dbf_views();
+dbf_err:
+       destroy_workqueue(qeth_wq);
 out_err:
        pr_err("Initializing the qeth device driver failed\n");
        return rc;