diff options
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index cbb101828dc3..ef17d8366ce2 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -51,6 +51,7 @@ static struct kmem_cache *qeth_qdio_outbuf_cache; static struct device *qeth_core_root_dev; static unsigned int known_devices[][6] = QETH_MODELLIST_ARRAY; static struct lock_class_key qdio_out_skb_queue_key; +static struct mutex qeth_mod_mutex; static void qeth_send_control_data_cb(struct qeth_channel *, struct qeth_cmd_buffer *); @@ -5040,6 +5041,7 @@ int qeth_core_load_discipline(struct qeth_card *card, enum qeth_discipline_id discipline) { int rc = 0; + mutex_lock(&qeth_mod_mutex); switch (discipline) { case QETH_DISCIPLINE_LAYER3: card->discipline.ccwgdriver = try_then_request_module( @@ -5057,6 +5059,7 @@ int qeth_core_load_discipline(struct qeth_card *card, "support discipline %d\n", discipline); rc = -EINVAL; } + mutex_unlock(&qeth_mod_mutex); return rc; } @@ -5540,6 +5543,7 @@ static int __init qeth_core_init(void) pr_info("loading core functions\n"); INIT_LIST_HEAD(&qeth_core_card_list.list); rwlock_init(&qeth_core_card_list.rwlock); + mutex_init(&qeth_mod_mutex); rc = qeth_register_dbf_views(); if (rc) |