diff options
| author | Ursula Braun <ursula.braun@de.ibm.com> | 2009-05-19 21:38:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-20 17:36:49 -0700 |
| commit | f214856540f6d704e817bf6b26a6bca9e697ee72 (patch) | |
| tree | 7c70c210ed6b9e67f4528cf06e3d5b372148dd1a | |
| parent | 04af8cf6f320031090ab6fa4600b912b0c18fb4b (diff) | |
| download | linux-f214856540f6d704e817bf6b26a6bca9e697ee72.tar.gz | |
qeth: avoid crash after detach of replugged device
If a qeth device is plugged off, setting the device online stops in state HARDSETUP and a failure is reported to the base cio-layer causing halt/clear to be invoked. Replugging the device again triggers a qeth recovery without notification of the cio-layer. If a device is ungrouped in this state, the qeth set_offline function is not invoked, because the corresponding ccwgroup device is not in state ONLINE. Then incoming traffic is still handled by the qdio layer resulting in a crash in qeth_l<x>_qdio_input_handler, because (part of) the qeth data structures for this device are already removed. Solution: After replugging the device qeth recovery should lead to a working net device. Thus a "LAN offline" result when setting a qeth device online must not report a failure to the base cio-layer. 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>
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 4 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 172031baedc1..44c15685ab86 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -839,6 +839,7 @@ static void qeth_l2_remove_device(struct ccwgroup_device *cgdev) { struct qeth_card *card = dev_get_drvdata(&cgdev->dev); + qeth_set_allowed_threads(card, 0, 1); wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); if (cgdev->state == CCWGROUP_ONLINE) { @@ -974,8 +975,9 @@ static int __qeth_l2_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; } - return rc; + goto out_remove; } else card->lan_online = 1; diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 0ba3817cb6a7..5873240c3cea 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -3070,6 +3070,7 @@ static void qeth_l3_remove_device(struct ccwgroup_device *cgdev) { struct qeth_card *card = dev_get_drvdata(&cgdev->dev); + qeth_set_allowed_threads(card, 0, 1); wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); if (cgdev->state == CCWGROUP_ONLINE) { @@ -3141,8 +3142,9 @@ 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; } - return rc; + goto out_remove; } else card->lan_online = 1; qeth_set_large_send(card, card->options.large_send); |