diff options
| author |   Julian Wiedmann <jwi@linux.ibm.com> | 2020-03-27 11:19:34 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-03-27 15:36:56 -0700 |
| commit | fb64de1bc36c7fdeb3b4279d0fe52496ce34c45a (patch) | |
| tree | 59da022b47b0528f5e480462d13e8fc73671d211 /drivers/s390 | |
| parent | s390/qeth: make OSN / OSX support configurable (diff) | |
| download | linux-dev-fb64de1bc36c7fdeb3b4279d0fe52496ce34c45a.tar.xz linux-dev-fb64de1bc36c7fdeb3b4279d0fe52496ce34c45a.zip | |
s390/qeth: phase out OSN support
OSN devices currently spend an awful long time in qeth_l2_set_online()
until various unsupported HW cmds time out. This has been broken for
over two years, ever since
commit d22ffb5a712f ("s390/qeth: fix IPA command submission race")
triggered a FW bug in cmd processing.
Prior to commit 782e4a792147 ("s390/qeth: don't poll for cmd IO completion"),
this wait for timeout would have even been spent busy-polling.
The offending patch was picked up by stable and all relevant distros,
and yet noone noticed.
OSN setups only ever worked in combination with an out-of-tree blob, and
the last machine that even offered HW with OSN support was released back
in 2015.
Rather than attempting to work-around this FW issue for no actual gain,
add a deprecation warning so anyone who still wants to maintain this
part of the code can speak up. Else rip it all out in 2021.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/net/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig index 36633387b952..3850a0f5f0bc 100644 --- a/drivers/s390/net/Kconfig +++ b/drivers/s390/net/Kconfig @@ -97,6 +97,7 @@ config QETH_OSN depends on QETH help This enables the qeth driver to support devices in OSN mode. + This feature will be removed in 2021. If unsure, choose N. config QETH_OSX diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 974b4596b78d..0bd5b09e7a22 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -587,6 +587,9 @@ static int qeth_l2_probe_device(struct ccwgroup_device *gdev) struct qeth_card *card = dev_get_drvdata(&gdev->dev); int rc; + if (IS_OSN(card)) + dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n"); + qeth_l2_vnicc_set_defaults(card); mutex_init(&card->sbp_lock); |