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authorJulian Wiedmann <jwi@linux.ibm.com>2020-03-27 11:19:34 +0100
committerDavid S. Miller <davem@davemloft.net>2020-03-27 15:36:56 -0700
commitfb64de1bc36c7fdeb3b4279d0fe52496ce34c45a (patch)
tree59da022b47b0528f5e480462d13e8fc73671d211 /drivers/s390/net
parent4e2b5aa5676bf969b6e9fe936852caf2d583d47f (diff)
downloadlinux-fb64de1bc36c7fdeb3b4279d0fe52496ce34c45a.tar.bz2
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/net')
-rw-r--r--drivers/s390/net/Kconfig1
-rw-r--r--drivers/s390/net/qeth_l2_main.c3
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);