net: dsa: mv88e6xxx: Add helper to get a chip's max_vid

Most of the other chip info constants have helpers to get at them; add
one for max_vid to keep things consistent.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201110185720.18228-1-tobias@waldekranz.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/mv88e6xxx/chip.c

@@ -1442,7 +1442,7 @@ static void mv88e6xxx_port_fast_age(struct dsa_switch *ds, int port)
 
 static int mv88e6xxx_vtu_setup(struct mv88e6xxx_chip *chip)
 {
-	if (!chip->info->max_vid)
+	if (!mv88e6xxx_max_vid(chip))
 		return 0;
 
 	return mv88e6xxx_g1_vtu_flush(chip);
@@ -1484,7 +1484,7 @@ int mv88e6xxx_fid_map(struct mv88e6xxx_chip *chip, unsigned long *fid_bitmap)
 	}
 
 	/* Set every FID bit used by the VLAN entries */
-	vlan.vid = chip->info->max_vid;
+	vlan.vid = mv88e6xxx_max_vid(chip);
 	vlan.valid = false;
 
 	do {
@@ -1496,7 +1496,7 @@ int mv88e6xxx_fid_map(struct mv88e6xxx_chip *chip, unsigned long *fid_bitmap)
 			break;
 
 		set_bit(vlan.fid, fid_bitmap);
-	} while (vlan.vid < chip->info->max_vid);
+	} while (vlan.vid < mv88e6xxx_max_vid(chip));
 
 	return 0;
 }
@@ -1587,7 +1587,7 @@ static int mv88e6xxx_port_vlan_filtering(struct dsa_switch *ds, int port,
 	int err;
 
 	if (switchdev_trans_ph_prepare(trans))
-		return chip->info->max_vid ? 0 : -EOPNOTSUPP;
+		return mv88e6xxx_max_vid(chip) ? 0 : -EOPNOTSUPP;
 
 	mv88e6xxx_reg_lock(chip);
 	err = mv88e6xxx_port_set_8021q_mode(chip, port, mode);
@@ -1603,7 +1603,7 @@ mv88e6xxx_port_vlan_prepare(struct dsa_switch *ds, int port,
 	struct mv88e6xxx_chip *chip = ds->priv;
 	int err;
 
-	if (!chip->info->max_vid)
+	if (!mv88e6xxx_max_vid(chip))
 		return -EOPNOTSUPP;
 
 	/* If the requested port doesn't belong to the same bridge as the VLAN
@@ -1973,7 +1973,7 @@ static void mv88e6xxx_port_vlan_add(struct dsa_switch *ds, int port,
 	u8 member;
 	u16 vid;
 
-	if (!chip->info->max_vid)
+	if (!mv88e6xxx_max_vid(chip))
 		return;
 
 	if (dsa_is_dsa_port(ds, port) || dsa_is_cpu_port(ds, port))
@@ -2051,7 +2051,7 @@ static int mv88e6xxx_port_vlan_del(struct dsa_switch *ds, int port,
 	u16 pvid, vid;
 	int err = 0;
 
-	if (!chip->info->max_vid)
+	if (!mv88e6xxx_max_vid(chip))
 		return -EOPNOTSUPP;
 
 	mv88e6xxx_reg_lock(chip);
@@ -2157,7 +2157,7 @@ static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port,
 		return err;
 
 	/* Dump VLANs' Filtering Information Databases */
-	vlan.vid = chip->info->max_vid;
+	vlan.vid = mv88e6xxx_max_vid(chip);
 	vlan.valid = false;
 
 	do {
@@ -2172,7 +2172,7 @@ static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port,
 						 cb, data);
 		if (err)
 			return err;
-	} while (vlan.vid < chip->info->max_vid);
+	} while (vlan.vid < mv88e6xxx_max_vid(chip));
 
 	return err;
 }

drivers/net/dsa/mv88e6xxx/chip.h

@@ -673,6 +673,11 @@ static inline unsigned int mv88e6xxx_num_ports(struct mv88e6xxx_chip *chip)
 	return chip->info->num_ports;
 }
 
+static inline unsigned int mv88e6xxx_max_vid(struct mv88e6xxx_chip *chip)
+{
+	return chip->info->max_vid;
+}
+
 static inline u16 mv88e6xxx_port_mask(struct mv88e6xxx_chip *chip)
 {
 	return GENMASK((s32)mv88e6xxx_num_ports(chip) - 1, 0);

drivers/net/dsa/mv88e6xxx/devlink.c

@@ -450,14 +450,14 @@ static int mv88e6xxx_region_vtu_snapshot(struct devlink *dl,
 	struct mv88e6xxx_vtu_entry vlan;
 	int err;
 
-	table = kcalloc(chip->info->max_vid + 1,
+	table = kcalloc(mv88e6xxx_max_vid(chip) + 1,
 			sizeof(struct mv88e6xxx_devlink_vtu_entry),
 			GFP_KERNEL);
 	if (!table)
 		return -ENOMEM;
 
 	entry = table;
-	vlan.vid = chip->info->max_vid;
+	vlan.vid = mv88e6xxx_max_vid(chip);
 	vlan.valid = false;
 
 	mv88e6xxx_reg_lock(chip);
@@ -488,7 +488,7 @@ static int mv88e6xxx_region_vtu_snapshot(struct devlink *dl,
 			break;
 
 		entry++;
-	} while (vlan.vid < chip->info->max_vid);
+	} while (vlan.vid < mv88e6xxx_max_vid(chip));
 
 	mv88e6xxx_reg_unlock(chip);
 
@@ -676,7 +676,7 @@ static int mv88e6xxx_setup_devlink_regions_global(struct dsa_switch *ds,
 				sizeof(struct mv88e6xxx_devlink_atu_entry);
 			break;
 		case MV88E6XXX_REGION_VTU:
-			size = chip->info->max_vid *
+			size = mv88e6xxx_max_vid(chip) *
 				sizeof(struct mv88e6xxx_devlink_vtu_entry);
 			break;
 		}