1 files changed, 21 insertions, 5 deletions

diff --git a/net/dsa/mv88e6131.c b/net/dsa/mv88e6131.c
index 3da418894efc..45f7411e90ba 100644
--- a/net/dsa/mv88e6131.c
+++ b/net/dsa/mv88e6131.c
@@ -207,8 +207,15 @@ static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
          * mode, but do not enable forwarding of unknown unicasts.
          */
         val = 0x0433;
-        if (p == dsa_upstream_port(ds))
+        if (p == dsa_upstream_port(ds)) {
                 val |= 0x0104;
+                /*
+                 * On 6085, unknown multicast forward is controlled
+                 * here rather than in Port Control 2 register.
+                 */
+                if (ps->id == ID_6085)
+                        val |= 0x0008;
+        }
         if (ds->dsa_port_mask & (1 << p))
                 val |= 0x0100;
         REG_WRITE(addr, 0x04, val);
@@ -251,10 +258,19 @@ static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
          * If this is the upstream port for this switch, enable
          * forwarding of unknown multicast addresses.
          */
-        val = 0x0080 | dsa_upstream_port(ds);
-        if (p == dsa_upstream_port(ds))
-                val |= 0x0040;
-        REG_WRITE(addr, 0x08, val);
+        if (ps->id == ID_6085)
+                /*
+                 * on 6085, bits 3:0 are reserved, bit 6 control ARP
+                 * mirroring, and multicast forward is handled in
+                 * Port Control register.
+                 */
+                REG_WRITE(addr, 0x08, 0x0080);
+        else {
+                val = 0x0080 | dsa_upstream_port(ds);
+                if (p == dsa_upstream_port(ds))
+                        val |= 0x0040;
+                REG_WRITE(addr, 0x08, val);
+        }
 
         /*
          * Rate Control: disable ingress rate limiting.