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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vivien Didelot , linux-kernel@vger.kernel.org (open list) Subject: [PATCH net v5 1/8] net: dsa: b53: initialize the jumbo frame size register offset Date: Thu, 12 Nov 2026 10:01:55 -0800 Message-ID: <20261112180202.324504-2-florian.fainelli@broadcom.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261112180202.324504-1-florian.fainelli@broadcom.com> References: <20261112180202.324504-1-florian.fainelli@broadcom.com> X-Mailing-List: linux-kernel@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 a2a5754c413c..ca2ba8c157b7 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -3172,6 +3172,7 @@ 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