openwrt/target/linux/lantiq/patches-6.6/0734-v6.11-net-dsa-lantiq_gswip-Use-dev_err_probe-where-appropr.patch

From 1763b155da022ac0f984463e68cb0cda8ffc1fe8 Mon Sep 17 00:00:00 2001
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: Tue, 11 Jun 2024 15:54:26 +0200
Subject: net: dsa: lantiq_gswip: Use dev_err_probe where appropriate

dev_err_probe() can be used to simplify the existing code. Also it means
we get rid of the following warning which is seen whenever the PMAC
(Ethernet controller which connects to GSWIP's CPU port) has not been
probed yet:
  gswip 1e108000.switch: dsa switch register failed: -517

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Link: https://lore.kernel.org/r/20240611135434.3180973-5-ms@dev.tdt.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/dsa/lantiq_gswip.c | 53 ++++++++++++++++++++----------------------
 1 file changed, 25 insertions(+), 28 deletions(-)

--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -1919,11 +1919,9 @@ static int gswip_gphy_fw_load(struct gsw
 	msleep(200);
 
 	ret = request_firmware(&fw, gphy_fw->fw_name, dev);
-	if (ret) {
-		dev_err(dev, "failed to load firmware: %s, error: %i\n",
-			gphy_fw->fw_name, ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to load firmware: %s\n",
+				     gphy_fw->fw_name);
 
 	/* GPHY cores need the firmware code in a persistent and contiguous
 	 * memory area with a 16 kB boundary aligned start address.
@@ -1936,9 +1934,9 @@ static int gswip_gphy_fw_load(struct gsw
 		dev_addr = ALIGN(dma_addr, XRX200_GPHY_FW_ALIGN);
 		memcpy(fw_addr, fw->data, fw->size);
 	} else {
-		dev_err(dev, "failed to alloc firmware memory\n");
 		release_firmware(fw);
-		return -ENOMEM;
+		return dev_err_probe(dev, -ENOMEM,
+				     "failed to alloc firmware memory\n");
 	}
 
 	release_firmware(fw);
@@ -1965,8 +1963,8 @@ static int gswip_gphy_fw_probe(struct gs
 
 	gphy_fw->clk_gate = devm_clk_get(dev, gphyname);
 	if (IS_ERR(gphy_fw->clk_gate)) {
-		dev_err(dev, "Failed to lookup gate clock\n");
-		return PTR_ERR(gphy_fw->clk_gate);
+		return dev_err_probe(dev, PTR_ERR(gphy_fw->clk_gate),
+				     "Failed to lookup gate clock\n");
 	}
 
 	ret = of_property_read_u32(gphy_fw_np, "reg", &gphy_fw->fw_addr_offset);
@@ -1986,8 +1984,8 @@ static int gswip_gphy_fw_probe(struct gs
 		gphy_fw->fw_name = priv->gphy_fw_name_cfg->ge_firmware_name;
 		break;
 	default:
-		dev_err(dev, "Unknown GPHY mode %d\n", gphy_mode);
-		return -EINVAL;
+		return dev_err_probe(dev, -EINVAL, "Unknown GPHY mode %d\n",
+				     gphy_mode);
 	}
 
 	gphy_fw->reset = of_reset_control_array_get_exclusive(gphy_fw_np);
@@ -2038,8 +2036,9 @@ static int gswip_gphy_fw_list(struct gsw
 			priv->gphy_fw_name_cfg = &xrx200a2x_gphy_data;
 			break;
 		default:
-			dev_err(dev, "unknown GSWIP version: 0x%x\n", version);
-			return -ENOENT;
+			return dev_err_probe(dev, -ENOENT,
+					     "unknown GSWIP version: 0x%x\n",
+					     version);
 		}
 	}
 
@@ -2047,10 +2046,9 @@ static int gswip_gphy_fw_list(struct gsw
 	if (match && match->data)
 		priv->gphy_fw_name_cfg = match->data;
 
-	if (!priv->gphy_fw_name_cfg) {
-		dev_err(dev, "GPHY compatible type not supported\n");
-		return -ENOENT;
-	}
+	if (!priv->gphy_fw_name_cfg)
+		return dev_err_probe(dev, -ENOENT,
+				     "GPHY compatible type not supported\n");
 
 	priv->num_gphy_fw = of_get_available_child_count(gphy_fw_list_np);
 	if (!priv->num_gphy_fw)
@@ -2150,8 +2148,8 @@ static int gswip_probe(struct platform_d
 			return -EINVAL;
 		break;
 	default:
-		dev_err(dev, "unknown GSWIP version: 0x%x\n", version);
-		return -ENOENT;
+		return dev_err_probe(dev, -ENOENT,
+				     "unknown GSWIP version: 0x%x\n", version);
 	}
 
 	/* bring up the mdio bus */
@@ -2159,10 +2157,9 @@ static int gswip_probe(struct platform_d
 	if (gphy_fw_np) {
 		err = gswip_gphy_fw_list(priv, gphy_fw_np, version);
 		of_node_put(gphy_fw_np);
-		if (err) {
-			dev_err(dev, "gphy fw probe failed\n");
-			return err;
-		}
+		if (err)
+			return dev_err_probe(dev, err,
+					     "gphy fw probe failed\n");
 	}
 
 	/* bring up the mdio bus */
@@ -2170,20 +2167,20 @@ static int gswip_probe(struct platform_d
 	if (mdio_np) {
 		err = gswip_mdio(priv, mdio_np);
 		if (err) {
-			dev_err(dev, "mdio probe failed\n");
+			dev_err_probe(dev, err, "mdio probe failed\n");
 			goto put_mdio_node;
 		}
 	}
 
 	err = dsa_register_switch(priv->ds);
 	if (err) {
-		dev_err(dev, "dsa switch register failed: %i\n", err);
+		dev_err_probe(dev, err, "dsa switch registration failed\n");
 		goto mdio_bus;
 	}
 	if (!dsa_is_cpu_port(priv->ds, priv->hw_info->cpu_port)) {
-		dev_err(dev, "wrong CPU port defined, HW only supports port: %i\n",
-			priv->hw_info->cpu_port);
-		err = -EINVAL;
+		err = dev_err_probe(dev, -EINVAL,
+				    "wrong CPU port defined, HW only supports port: %i\n",
+				    priv->hw_info->cpu_port);
 		goto disable_switch;
 	}