The chip data specifies both the jumbo port mask and frame size register offsets, but b53_switch_init() only copies the former into the device. Since the device is zero-initialized, b53_set_jumbo() writes the frame size to offset zero instead of the chip-specific size register at 0x05 or 0x08. Copy jumbo_size_reg from the chip data along with jumbo_pm_reg so frame size updates reach the intended register. Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch") Signed-off-by: Florian Fainelli --- drivers/net/dsa/b53/b53_common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 0880310c9ce3..559d4b360c82 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -3109,6 +3109,7 @@ static int b53_switch_init(struct b53_device *dev) dev->vta_regs[1] = chip->vta_regs[1]; dev->vta_regs[2] = chip->vta_regs[2]; dev->jumbo_pm_reg = chip->jumbo_pm_reg; + dev->jumbo_size_reg = chip->jumbo_size_reg; dev->imp_port = chip->imp_port; dev->num_vlans = chip->vlans; dev->num_arl_bins = chip->arl_bins; -- 2.53.0