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| 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 /drivers/s390/net/qeth_core_mpc.c | |
| parent | net: Remove unused parameter from fill method in fib_rules_ops. (diff) | |
| download | linux-dev-f214856540f6d704e817bf6b26a6bca9e697ee72.tar.xz linux-dev-f214856540f6d704e817bf6b26a6bca9e697ee72.zip | |
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>
Diffstat (limited to 'drivers/s390/net/qeth_core_mpc.c')
0 files changed, 0 insertions, 0 deletions