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authorFrank Blaschka <frank.blaschka@de.ibm.com>2010-05-11 19:34:47 +0000
committerDavid S. Miller <davem@davemloft.net>2010-05-16 00:50:11 -0700
commitc4949f074332a64baeb2ead6ab9319ca37642f96 (patch)
tree185005280b499114ba872560efe21ec75b0ba726 /drivers/s390/net/qeth_l3_main.c
parent65a1f898efac136aeea65509e61ac6cdecd4f6bf (diff)
qeth: synchronize configuration interface
Synchronize access to the drivers configuration interface. Also do not allow configuration changes during online/offline transition. 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/qeth_l3_main.c')
-rw-r--r--drivers/s390/net/qeth_l3_main.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 8bcad24ccf37..83c7f9444c4f 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -3378,6 +3378,7 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
enum qeth_card_states recover_flag;
BUG_ON(!card);
+ mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 2, "setonlin");
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
@@ -3409,7 +3410,7 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
dev_warn(&card->gdev->dev,
"The LAN is offline\n");
card->lan_online = 0;
- return 0;
+ goto out;
}
rc = -ENODEV;
goto out_remove;
@@ -3456,6 +3457,8 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
}
/* let user_space know that device is online */
kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
+out:
+ mutex_unlock(&card->conf_mutex);
return 0;
out_remove:
card->use_hard_stop = 1;
@@ -3467,6 +3470,7 @@ out_remove:
card->state = CARD_STATE_RECOVER;
else
card->state = CARD_STATE_DOWN;
+ mutex_unlock(&card->conf_mutex);
return rc;
}
@@ -3482,6 +3486,7 @@ static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
int rc = 0, rc2 = 0, rc3 = 0;
enum qeth_card_states recover_flag;
+ mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 3, "setoffl");
QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
@@ -3500,6 +3505,7 @@ static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
card->state = CARD_STATE_RECOVER;
/* let user_space know that device is offline */
kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
+ mutex_unlock(&card->conf_mutex);
return 0;
}