Thread (33 messages) 33 messages, 5 authors, 2021-02-11

Re: [PATCH v3 net-next 07/11] net: prep switchdev drivers for concurrent SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS

From: Ido Schimmel <hidden>
Date: 2021-02-10 10:27:51
Also in: bridge, linux-omap, lkml 

On Wed, Feb 10, 2021 at 11:14:41AM +0200, Vladimir Oltean wrote:
From: Vladimir Oltean <vladimir.oltean@nxp.com>

Because the bridge will start offloading SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS
while not serialized by any lock such as the br->lock spinlock, existing
drivers that treat that attribute and cache the brport flags might no
longer work correctly.
Can you explain the race? This notification is sent from sysfs/netlink
call path, both of which take rtnl.
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