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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Russell King , "Russell King (Oracle)" , linux-kernel@vger.kernel.org (open list) Subject: [PATCH net v2 1/5] net: dsa: b53: initialize the jumbo frame size register offset Date: Wed, 28 Oct 2026 14:23:06 -0700 Message-ID: <20261028212310.3847553-2-florian.fainelli@broadcom.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261028212310.3847553-1-florian.fainelli@broadcom.com> References: <20261028212310.3847553-1-florian.fainelli@broadcom.com> X-Mailing-List: netdev@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e 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") Reviewed-by: Jonas Gorski 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