diff options
| author | Frank Blaschka <frank.blaschka@de.ibm.com> | 2012-03-07 02:06:25 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-03-07 22:52:25 -0800 |
| commit | 2022e00cd5c0a9b43163834a51af664de16cfc3c (patch) | |
| tree | 561becc2102024d2cfa8ed98002fe99e6e27e42f /drivers/s390/net | |
| parent | 82492a355fac112908271faa74f473a38c1fb647 (diff) | |
qeth: synchronize discipline module loading
During system startup udev may try to configure devices in
parallel so we have to synchronize discipline module
loading.
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
| -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 cbb101828dc..ef17d8366ce 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) |