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authorUrsula Braun <ursula.braun@de.ibm.com>2010-03-08 23:36:56 +0300
committerDavid S. Miller <davem@davemloft.net>2010-03-10 18:32:26 +0300
commit869da90b9ae39f0d5b9b5aa3a84502684a6aa1f4 (patch)
tree50519820fcb4c2cd7ab4a0d76074a46539680229 /drivers/s390
parenta959189a978e0104e8aa7f1522f5eff42d891456 (diff)
downloadlinux-869da90b9ae39f0d5b9b5aa3a84502684a6aa1f4.tar.xz
qeth: no recovery after layer mismatch (z/VM NICs)
Depending on their definition in z/VM, virtual devices for z/VM VSWITCH or GuestLAN must be configured either in layer2 or in layer3 mode. If qeth detects a layer mismatch, device activation fails. Trying to recover from this error cannot help; thus scheduling a recovery should be avoided. In addition, since recovery is forbidden during online setting of a qeth device, existence of its network device is guaranteed for all dev_close() calls in qeth. The corresponding checks can be removed. 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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_core_main.c3
-rw-r--r--drivers/s390/net/qeth_l2_main.c16
-rw-r--r--drivers/s390/net/qeth_l3_main.c16
3 files changed, 14 insertions, 21 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index fa8a519218ac..834830a4866d 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -537,7 +537,8 @@ static void qeth_send_control_data_cb(struct qeth_channel *channel,
dev_err(&card->gdev->dev,
"The qeth device is not configured "
"for the OSI layer required by z/VM\n");
- qeth_schedule_recovery(card);
+ else
+ qeth_schedule_recovery(card);
goto out;
}
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 51fde6f2e0b8..6f1e3036bafd 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1071,11 +1071,9 @@ static int qeth_l2_recover(void *ptr)
dev_info(&card->gdev->dev,
"Device successfully recovered!\n");
else {
- if (card->dev) {
- rtnl_lock();
- dev_close(card->dev);
- rtnl_unlock();
- }
+ rtnl_lock();
+ dev_close(card->dev);
+ rtnl_unlock();
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
}
@@ -1129,11 +1127,9 @@ static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
if (card->state == CARD_STATE_RECOVER) {
rc = __qeth_l2_set_online(card->gdev, 1);
if (rc) {
- if (card->dev) {
- rtnl_lock();
- dev_close(card->dev);
- rtnl_unlock();
- }
+ rtnl_lock();
+ dev_close(card->dev);
+ rtnl_unlock();
}
} else
rc = __qeth_l2_set_online(card->gdev, 0);
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index cd746da2951e..b3b6e872d806 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2219,11 +2219,9 @@ static int qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
if (recovery_mode)
qeth_l3_stop(card->dev);
else {
- if (card->dev) {
- rtnl_lock();
- dev_close(card->dev);
- rtnl_unlock();
- }
+ rtnl_lock();
+ dev_close(card->dev);
+ rtnl_unlock();
}
if (!card->use_hard_stop) {
rc = qeth_send_stoplan(card);
@@ -3536,11 +3534,9 @@ static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
if (card->state == CARD_STATE_RECOVER) {
rc = __qeth_l3_set_online(card->gdev, 1);
if (rc) {
- if (card->dev) {
- rtnl_lock();
- dev_close(card->dev);
- rtnl_unlock();
- }
+ rtnl_lock();
+ dev_close(card->dev);
+ rtnl_unlock();
}
} else
rc = __qeth_l3_set_online(card->gdev, 0);