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s390/qeth: convert vlan spinlock to mutex

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As the vid_list is only accessed from process context, there's no need to
protect it with a spinlock.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2018-04-26 09:42:13 +02:00 committed by David S. Miller
parent 7bcd64eb8c
commit d4ac024688
3 changed files with 10 additions and 9 deletions
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2
drivers/s390/net/qeth_core.h
View File

@ -777,9 +777,9 @@ struct qeth_card {
struct qeth_card_options options;
wait_queue_head_t wait_q;
spinlock_t vlanlock;
spinlock_t mclock;
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
struct mutex vid_list_mutex; /* vid_list */
struct list_head vid_list;
DECLARE_HASHTABLE(mac_htable, 4);
DECLARE_HASHTABLE(ip_htable, 4);

2
drivers/s390/net/qeth_core_main.c
View File

@ -1467,13 +1467,13 @@ static int qeth_setup_card(struct qeth_card *card)
card->lan_online = 0;
card->read_or_write_problem = 0;
card->dev = NULL;
spin_lock_init(&card->vlanlock);
spin_lock_init(&card->mclock);
spin_lock_init(&card->lock);
spin_lock_init(&card->ip_lock);
spin_lock_init(&card->thread_mask_lock);
mutex_init(&card->conf_mutex);
mutex_init(&card->discipline_mutex);
mutex_init(&card->vid_list_mutex);
card->thread_start_mask = 0;
card->thread_allowed_mask = 0;
card->thread_running_mask = 0;

15
drivers/s390/net/qeth_l2_main.c
View File

@ -297,12 +297,13 @@ static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
static void qeth_l2_process_vlans(struct qeth_card *card)
{
struct qeth_vlan_vid *id;
QETH_CARD_TEXT(card, 3, "L2prcvln");
spin_lock_bh(&card->vlanlock);
mutex_lock(&card->vid_list_mutex);
list_for_each_entry(id, &card->vid_list, list) {
qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
}
spin_unlock_bh(&card->vlanlock);
mutex_unlock(&card->vid_list_mutex);
}
static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
@ -319,7 +320,7 @@ static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
QETH_CARD_TEXT(card, 3, "aidREC");
return 0;
}
id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
id = kmalloc(sizeof(*id), GFP_KERNEL);
if (id) {
id->vid = vid;
rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
@ -327,9 +328,9 @@ static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
kfree(id);
return rc;
}
spin_lock_bh(&card->vlanlock);
mutex_lock(&card->vid_list_mutex);
list_add_tail(&id->list, &card->vid_list);
spin_unlock_bh(&card->vlanlock);
mutex_unlock(&card->vid_list_mutex);
} else {
return -ENOMEM;
}
@ -348,7 +349,7 @@ static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
QETH_CARD_TEXT(card, 3, "kidREC");
return 0;
}
spin_lock_bh(&card->vlanlock);
mutex_lock(&card->vid_list_mutex);
list_for_each_entry(id, &card->vid_list, list) {
if (id->vid == vid) {
list_del(&id->list);
@ -356,7 +357,7 @@ static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
break;
}
}
spin_unlock_bh(&card->vlanlock);
mutex_unlock(&card->vid_list_mutex);
if (tmpid) {
rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
kfree(tmpid);