diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2022-02-11 20:45:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-23 14:03:11 +0300 |
| commit | 2566a89b9e163b2fcd104d6005e0149f197b8a48 (patch) | |
| tree | 93530424b037f6262d1ff75f1df7623962252d15 /include/net | |
| parent | d8905a499af408d600ea37af3c58214308aba7fe (diff) | |
| download | linux-2566a89b9e163b2fcd104d6005e0149f197b8a48.tar.xz | |
net: dsa: mv88e6xxx: flush switchdev FDB workqueue before removing VLAN
commit a2614140dc0f467a83aa3bb4b6ee2d6480a76202 upstream.
mv88e6xxx is special among DSA drivers in that it requires the VTU to
contain the VID of the FDB entry it modifies in
mv88e6xxx_port_db_load_purge(), otherwise it will return -EOPNOTSUPP.
Sometimes due to races this is not always satisfied even if external
code does everything right (first deletes the FDB entries, then the
VLAN), because DSA commits to hardware FDB entries asynchronously since
commit c9eb3e0f8701 ("net: dsa: Add support for learning FDB through
notification").
Therefore, the mv88e6xxx driver must close this race condition by
itself, by asking DSA to flush the switchdev workqueue of any FDB
deletions in progress, prior to exiting a VLAN.
Fixes: c9eb3e0f8701 ("net: dsa: Add support for learning FDB through notification")
Reported-by: Rafael Richter <rafael.richter@gin.de>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/dsa.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h index d784e76113b8..49e5ece9361c 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -1056,6 +1056,7 @@ void dsa_unregister_switch(struct dsa_switch *ds); int dsa_register_switch(struct dsa_switch *ds); void dsa_switch_shutdown(struct dsa_switch *ds); struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); +void dsa_flush_workqueue(void); #ifdef CONFIG_PM_SLEEP int dsa_switch_suspend(struct dsa_switch *ds); int dsa_switch_resume(struct dsa_switch *ds); |