Patch "mlxbf_gige: Enable the GigE port in mlxbf_gige_open" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    mlxbf_gige: Enable the GigE port in mlxbf_gige_open

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mlxbf_gige-enable-the-gige-port-in-mlxbf_gige_open.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 3fbde3859d1fb9682c2164ec810df78e9c4c9cce
Author: Asmaa Mnebhi <asmaa@xxxxxxxxxx>
Date:   Fri Jan 5 11:00:14 2024 -0500

    mlxbf_gige: Enable the GigE port in mlxbf_gige_open
    
    [ Upstream commit a460f4a684511e007bbf1700758a41f05d9981e6 ]
    
    At the moment, the GigE port is enabled in the mlxbf_gige_probe
    function. If the mlxbf_gige_open is not executed, this could cause
    pause frames to increase in the case where there is high backgroud
    traffic. This results in clogging the port.
    So move enabling the OOB port to mlxbf_gige_open.
    
    Fixes: f92e1869d74e ("Add Mellanox BlueField Gigabit Ethernet driver")
    Reviewed-by: David Thompson <davthompson@xxxxxxxxxx>
    Signed-off-by: Asmaa Mnebhi <asmaa@xxxxxxxxxx>
    Reviewed-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
index 181a0845a105..679415a64f25 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
@@ -132,9 +132,15 @@ static int mlxbf_gige_open(struct net_device *netdev)
 {
 	struct mlxbf_gige *priv = netdev_priv(netdev);
 	struct phy_device *phydev = netdev->phydev;
+	u64 control;
 	u64 int_en;
 	int err;
 
+	/* Perform general init of GigE block */
+	control = readq(priv->base + MLXBF_GIGE_CONTROL);
+	control |= MLXBF_GIGE_CONTROL_PORT_EN;
+	writeq(control, priv->base + MLXBF_GIGE_CONTROL);
+
 	err = mlxbf_gige_request_irqs(priv);
 	if (err)
 		return err;
@@ -281,7 +287,6 @@ static int mlxbf_gige_probe(struct platform_device *pdev)
 	void __iomem *plu_base;
 	void __iomem *base;
 	int addr, phy_irq;
-	u64 control;
 	int err;
 
 	base = devm_platform_ioremap_resource(pdev, MLXBF_GIGE_RES_MAC);
@@ -296,11 +301,6 @@ static int mlxbf_gige_probe(struct platform_device *pdev)
 	if (IS_ERR(plu_base))
 		return PTR_ERR(plu_base);
 
-	/* Perform general init of GigE block */
-	control = readq(base + MLXBF_GIGE_CONTROL);
-	control |= MLXBF_GIGE_CONTROL_PORT_EN;
-	writeq(control, base + MLXBF_GIGE_CONTROL);
-
 	netdev = devm_alloc_etherdev(&pdev->dev, sizeof(*priv));
 	if (!netdev)
 		return -ENOMEM;