From: Ursula Braun <ursula.braun@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Frank Blaschka <frank.blaschka@xxxxxxxxxx>
---
drivers/s390/net/qeth_l2_main.c | 4 +++-
drivers/s390/net/qeth_l3_main.c | 4 +++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff -urpN linux-2.6/drivers/s390/net/qeth_l2_main.c linux-2.6-patched/drivers/s390/net/qeth_l2_main.c
--- linux-2.6/drivers/s390/net/qeth_l2_main.c 2009-05-20 08:56:25.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/qeth_l2_main.c 2009-05-20 08:56:42.000000000 +0200
@@ -839,6 +839,7 @@ static void qeth_l2_remove_device(struct
{
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 c
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 -urpN linux-2.6/drivers/s390/net/qeth_l3_main.c linux-2.6-patched/drivers/s390/net/qeth_l3_main.c
--- linux-2.6/drivers/s390/net/qeth_l3_main.c 2009-05-20 08:56:25.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/qeth_l3_main.c 2009-05-20 08:56:42.000000000 +0200
@@ -3070,6 +3070,7 @@ static void qeth_l3_remove_device(struct
{
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 c
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);
--
To unsubscribe from this list: send the line "unsubscribe linux-s390" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
