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qeth: serialize sysfs-triggered device configurations

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This patch serializes device removal and other sysfs-triggered
configurations by moving removal of sysfs-attributes to the beginning
of the remove functions. And it serializes online/offline setting
and discipline-switching (causing reestablishing of the net_device)
by making use of a new discipline mutex.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun
2010-07-22 23:15:05 +00:00
committed by David S. Miller
parent 75e0de1363
commit 9dc48ccc68
5 changed files with 22 additions and 7 deletions
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drivers/s390/net/qeth_core_main.c
+7 -4
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@@ -1084,6 +1084,7 @@ static int qeth_setup_card(struct qeth_card *card)
spin_lock_init(&card->ip_lock);
spin_lock_init(&card->thread_mask_lock);
mutex_init(&card->conf_mutex);
mutex_init(&card->discipline_mutex);
card->thread_start_mask = 0;
card->thread_allowed_mask = 0;
card->thread_running_mask = 0;
@@ -4348,16 +4349,18 @@ static void qeth_core_remove_device(struct ccwgroup_device *gdev)
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
QETH_DBF_TEXT(SETUP, 2, "removedv");
if (card->discipline.ccwgdriver) {
card->discipline.ccwgdriver->remove(gdev);
qeth_core_free_discipline(card);
}
if (card->info.type == QETH_CARD_TYPE_OSN) {
qeth_core_remove_osn_attributes(&gdev->dev);
} else {
qeth_core_remove_device_attributes(&gdev->dev);
}
if (card->discipline.ccwgdriver) {
card->discipline.ccwgdriver->remove(gdev);
qeth_core_free_discipline(card);
}
debug_unregister(card->debug);
write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
list_del(&card->list);