The default switch frame size (with FCS + header) is 1536 bytes. But the GMAC only accepted frames up to 1522 bytes. Setting it to 1536 allows to receive ethernet frames using the full of MTU 1500 + an extra VLAN header + VLAN header added by the switch.
Signed-off-by: Sven Eckelmann <[email protected]> --- .../linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c index 8039704..325e243 100644 --- a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c +++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c @@ -602,12 +602,12 @@ static void gsw_hw_init_mt7621(struct mt7620_gsw *gsw, struct device_node *np) udelay(10); if ((rt_sysc_r32(SYSC_REG_CHIP_REV_ID) & 0xFFFF) == 0x0101) { - /* (GE1, Force 1000M/FD, FC ON) */ - gsw_w32(gsw, 0x2005e30b, 0x100); + /* (GE1, Force 1000M/FD, FC ON, MAX_RX_LENGTH 1536) */ + gsw_w32(gsw, 0x2105e30b, 0x100); mt7530_mdio_w32(gsw, 0x3600, 0x5e30b); } else { - /* (GE1, Force 1000M/FD, FC ON) */ - gsw_w32(gsw, 0x2005e33b, 0x100); + /* (GE1, Force 1000M/FD, FC ON, MAX_RX_LENGTH 1536) */ + gsw_w32(gsw, 0x2105e33b, 0x100); mt7530_mdio_w32(gsw, 0x3600, 0x5e33b); } -- 2.5.3 _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
