s390/qeth: reduce rtnl locking for switchdev events

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call_switchdev_notifiers() doesn't require holding the RTNL lock since
commit ff5cf10011 ("net: switchdev: Change notifier chain to be atomic").

We still need it for the "lost event" slow path, to avoid racing against
a concurrent .ndo_bridge_setlink().

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Julian Wiedmann 2020-11-17 17:15:13 +01:00 • committed by Jakub Kicinski

parent bd4bdeb4f2

commit 09840f70b0

1 changed files with 15 additions and 18 deletions

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drivers/s390/net/qeth_l2_main.c

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