qeth: serialize sysfs-triggered device configurations
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>
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 15b5ca8..e22ae24 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -3354,6 +3354,8 @@
{
struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
+ qeth_l3_remove_device_attributes(&cgdev->dev);
+
qeth_set_allowed_threads(card, 0, 1);
wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
@@ -3367,7 +3369,6 @@
card->dev = NULL;
}
- qeth_l3_remove_device_attributes(&cgdev->dev);
qeth_l3_clear_ip_list(card, 0, 0);
qeth_l3_clear_ipato_list(card);
return;
@@ -3380,6 +3381,7 @@
enum qeth_card_states recover_flag;
BUG_ON(!card);
+ mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 2, "setonlin");
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
@@ -3461,6 +3463,7 @@
kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
out:
mutex_unlock(&card->conf_mutex);
+ mutex_unlock(&card->discipline_mutex);
return 0;
out_remove:
card->use_hard_stop = 1;
@@ -3473,6 +3476,7 @@
else
card->state = CARD_STATE_DOWN;
mutex_unlock(&card->conf_mutex);
+ mutex_unlock(&card->discipline_mutex);
return rc;
}
@@ -3488,6 +3492,7 @@
int rc = 0, rc2 = 0, rc3 = 0;
enum qeth_card_states recover_flag;
+ mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 3, "setoffl");
QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
@@ -3508,6 +3513,7 @@
/* let user_space know that device is offline */
kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
mutex_unlock(&card->conf_mutex);
+ mutex_unlock(&card->discipline_mutex);
return 0;
}