[PATCH 4.19 066/131] net: dsa: b53: Lookup VID in ARL searches when VLAN is enabled

[Greg Kroah-Hartman]

From: Florian Fainelli <f.faine...@gmail.com>

[ Upstream commit 2e97b0cd1651a270f3a3fcf42115c51f3284c049 ]

When VLAN is enabled, and an ARL search is issued, we also need to
compare the full {MAC,VID} tuple before returning a successful search
result.

Fixes: 1da6df85c6fb ("net: dsa: b53: Implement ARL add/del/dump operations")
Reviewed-by: Andrew Lunn <and...@lunn.ch>
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/dsa/b53/b53_common.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1284,6 +1284,9 @@ static int b53_arl_read(struct b53_devic
                        continue;
                if ((mac_vid & ARLTBL_MAC_MASK) != mac)
                        continue;
+               if (dev->vlan_enabled &&
+                   ((mac_vid >> ARLTBL_VID_S) & ARLTBL_VID_MASK) != vid)
+                       continue;
                *idx = i;
        }