net: dsa: lan9303: Protect ALR operations with mutex

ALR table operations are a sequence of related register operations which
should be protected from concurrent access. The alr_cache should also be
protected. Add alr_mutex doing that.

Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/dsa/lan9303.h b/include/linux/dsa/lan9303.h
index f48a85c377de..b6514c29563f 100644
--- a/include/linux/dsa/lan9303.h
+++ b/include/linux/dsa/lan9303.h
@@ -26,6 +26,7 @@ struct lan9303 {
         bool phy_addr_sel_strap;
         struct dsa_switch *ds;
         struct mutex indirect_mutex; /* protect indexed register access */
+        struct mutex alr_mutex; /* protect ALR access */
         const struct lan9303_phy_ops *ops;
         bool is_bridged; /* true if port 1 and 2 are bridged */