Merge branch 'refine-stmmac-code'

Tiezhu Yang says:

====================
Refine stmmac code

Here are three small patches to refine stmmac code when debugging and
testing the problem "Failed to reset the dma".
====================

Link: https://patch.msgid.link/20250811073506.27513-1-yangtiezhu@loongson.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

5 files changed, 19 insertions, 7 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
index 889e2bb6f7f5..c2d9e89f0063 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
@@ -49,7 +49,7 @@ struct imx_dwmac_ops {
 	u32 flags;
 	bool mac_rgmii_txclk_auto_adj;
 
-	int (*fix_soc_reset)(void *priv, void __iomem *ioaddr);
+	int (*fix_soc_reset)(struct stmmac_priv *priv, void __iomem *ioaddr);
 	int (*set_intf_mode)(struct plat_stmmacenet_data *plat_dat);
 	void (*fix_mac_speed)(void *priv, int speed, unsigned int mode);
 };
@@ -265,9 +265,9 @@ static void imx93_dwmac_fix_speed(void *priv, int speed, unsigned int mode)
 	writel(old_ctrl, dwmac->base_addr + MAC_CTRL_REG);
 }
 
-static int imx_dwmac_mx93_reset(void *priv, void __iomem *ioaddr)
+static int imx_dwmac_mx93_reset(struct stmmac_priv *priv, void __iomem *ioaddr)
 {
-	struct plat_stmmacenet_data *plat_dat = priv;
+	struct plat_stmmacenet_data *plat_dat = priv->plat;
 	u32 value = readl(ioaddr + DMA_BUS_MODE);
 
 	/* DMA SW reset */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index 5769165ee5ba..6fca0fca4892 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -509,10 +509,15 @@ static int loongson_dwmac_acpi_config(struct pci_dev *pdev,
 }
 
 /* Loongson's DWMAC device may take nearly two seconds to complete DMA reset */
-static int loongson_dwmac_fix_reset(void *priv, void __iomem *ioaddr)
+static int loongson_dwmac_fix_reset(struct stmmac_priv *priv, void __iomem *ioaddr)
 {
 	u32 value = readl(ioaddr + DMA_BUS_MODE);
 
+	if (value & DMA_BUS_MODE_SFT_RESET) {
+		netdev_err(priv->dev, "the PHY clock is missing\n");
+		return -EINVAL;
+	}
+
 	value |= DMA_BUS_MODE_SFT_RESET;
 	writel(value, ioaddr + DMA_BUS_MODE);
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 99635b37044a..3f7c765dcb79 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -100,7 +100,7 @@ int stmmac_reset(struct stmmac_priv *priv, void __iomem *ioaddr)
 		return -EINVAL;
 
 	if (plat && plat->fix_soc_reset)
-		return plat->fix_soc_reset(plat, ioaddr);
+		return plat->fix_soc_reset(priv, ioaddr);
 
 	return stmmac_do_callback(priv, dma, reset, ioaddr);
 }
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 4a82045ea6eb..9a77390b7f9d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7984,7 +7984,14 @@ int stmmac_resume(struct device *dev)
 	stmmac_free_tx_skbufs(priv);
 	stmmac_clear_descriptors(priv, &priv->dma_conf);
 
-	stmmac_hw_setup(ndev, false);
+	ret = stmmac_hw_setup(ndev, false);
+	if (ret < 0) {
+		netdev_err(priv->dev, "%s: Hw setup failed\n", __func__);
+		mutex_unlock(&priv->lock);
+		rtnl_unlock();
+		return ret;
+	}
+
 	stmmac_init_coalesce(priv);
 	phylink_rx_clk_stop_block(priv->phylink);
 	stmmac_set_rx_mode(ndev);
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 22c24dacbc65..e284f04964bf 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -238,7 +238,7 @@ struct plat_stmmacenet_data {
 	int (*set_clk_tx_rate)(void *priv, struct clk *clk_tx_i,
 			       phy_interface_t interface, int speed);
 	void (*fix_mac_speed)(void *priv, int speed, unsigned int mode);
-	int (*fix_soc_reset)(void *priv, void __iomem *ioaddr);
+	int (*fix_soc_reset)(struct stmmac_priv *priv, void __iomem *ioaddr);
 	int (*serdes_powerup)(struct net_device *ndev, void *priv);
 	void (*serdes_powerdown)(struct net_device *ndev, void *priv);
 	int (*mac_finish)(struct net_device *ndev,