net: dsa: mv88e6xxx: Fix off-by-one in VTU devlink region size

In the unlikely event of the VTU being loaded to the brim with 4k
entries, the last one was placed in the buffer, but the size reported
to devlink was off-by-one. Make sure that the final entry is available
to the caller.

Fixes: ca4d632aef03 ("net: dsa: mv88e6xxx: Export VTU as devlink region")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6xxx/devlink.c b/drivers/net/dsa/mv88e6xxx/devlink.c
index 21953d6d484c58ad52a23d3347a846077e3c29a2..ada7a38d4d313971a51376f013d6359eea8088f0 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/devlink.c
+++ b/drivers/net/dsa/mv88e6xxx/devlink.c
@@ -678,7 +678,7 @@ static int mv88e6xxx_setup_devlink_regions_global(struct dsa_switch *ds,
                                sizeof(struct mv88e6xxx_devlink_atu_entry);
                        break;
                case MV88E6XXX_REGION_VTU:
-                       size = mv88e6xxx_max_vid(chip) *
+                       size = (mv88e6xxx_max_vid(chip) + 1) *
                                sizeof(struct mv88e6xxx_devlink_vtu_entry);
                        break;
                }