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path: root/drivers/net/dsa/b53/b53_common.c
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Diffstat (limited to 'drivers/net/dsa/b53/b53_common.c')
-rw-r--r--drivers/net/dsa/b53/b53_common.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 0783fc121bbb..c39cb119e760 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -27,6 +27,7 @@
#include <linux/phylink.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
#include <net/dsa.h>
#include "b53_regs.h"
@@ -224,6 +225,9 @@ static const struct b53_mib_desc b53_mibs_58xx[] = {
#define B53_MIBS_58XX_SIZE ARRAY_SIZE(b53_mibs_58xx)
+#define B53_MAX_MTU_25 (1536 - ETH_HLEN - VLAN_HLEN - ETH_FCS_LEN)
+#define B53_MAX_MTU (9720 - ETH_HLEN - VLAN_HLEN - ETH_FCS_LEN)
+
static int b53_do_vlan_op(struct b53_device *dev, u8 op)
{
unsigned int i;
@@ -2254,20 +2258,25 @@ static int b53_change_mtu(struct dsa_switch *ds, int port, int mtu)
bool allow_10_100;
if (is5325(dev) || is5365(dev))
- return -EOPNOTSUPP;
+ return 0;
if (!dsa_is_cpu_port(ds, port))
return 0;
- enable_jumbo = (mtu >= JMS_MIN_SIZE);
- allow_10_100 = (dev->chip_id == BCM583XX_DEVICE_ID);
+ enable_jumbo = (mtu > ETH_DATA_LEN);
+ allow_10_100 = !is63xx(dev);
return b53_set_jumbo(dev, enable_jumbo, allow_10_100);
}
static int b53_get_max_mtu(struct dsa_switch *ds, int port)
{
- return JMS_MAX_SIZE;
+ struct b53_device *dev = ds->priv;
+
+ if (is5325(dev) || is5365(dev))
+ return B53_MAX_MTU_25;
+
+ return B53_MAX_MTU;
}
static const struct phylink_mac_ops b53_phylink_mac_ops = {