From 9dc48ccc68b9dfc01c2beee2d4317fb3df3fdce9 Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Thu, 22 Jul 2010 23:15:05 +0000 Subject: 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 Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- drivers/s390/net/qeth_l2_main.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/s390/net/qeth_l2_main.c') diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 32d07c2dcc67..5e66333a8bea 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -935,6 +935,7 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode) 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 *)); @@ -1012,6 +1013,7 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode) kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE); out: mutex_unlock(&card->conf_mutex); + mutex_unlock(&card->discipline_mutex); return 0; out_remove: @@ -1025,6 +1027,7 @@ out_remove: else card->state = CARD_STATE_DOWN; mutex_unlock(&card->conf_mutex); + mutex_unlock(&card->discipline_mutex); return rc; } @@ -1040,6 +1043,7 @@ static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev, 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 *)); @@ -1060,6 +1064,7 @@ static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev, /* 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; } -- cgit v1.2.3