net: sparx5: Refactor mdb handling according to feedback

[linux-2.6-microblaze.git] / drivers / net / ethernet / microchip / sparx5 / sparx5_pgid.c

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_pgid.c b/drivers/net/ethernet/microchip/sparx5/sparx5_pgid.c
index 851a559..af8b435 100644 (file)
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_pgid.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_pgid.c
@@ -19,6 +19,9 @@ int sparx5_pgid_alloc_mcast(struct sparx5 *spx5, u16 *idx)
 {
        int i;
 
+       /* The multicast area starts at index 65, but the first 7
+        * are reserved for flood masks and CPU. Start alloc after that.
+        */
        for (i = PGID_MCAST_START; i < PGID_TABLE_SIZE; i++) {
                if (spx5->pgid_map[i] == SPX5_PGID_FREE) {
                        spx5->pgid_map[i] = SPX5_PGID_MULTICAST;