net: dwmac_socfpga: initialize local data for mdio regmap configuration

Explicitly zero-ize the local mdio_regmap_config data, and explicitly
set the .autoscan parameter, as we only have a PCS on this bus.

Fixes: 5d1f3fe7d2d5 ("net: stmmac: dwmac-sogfpga: use the lynx pcs driver")
Suggested-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 1fb808b..6267bcb 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -389,7 +389,6 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
        struct net_device       *ndev;
        struct stmmac_priv      *stpriv;
        const struct socfpga_dwmac_ops *ops;
-       struct regmap_config pcs_regmap_cfg;
 
        ops = device_get_match_data(&pdev->dev);
        if (!ops) {
@@ -447,19 +446,22 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
        if (ret)
                goto err_dvr_remove;
 
-       memset(&pcs_regmap_cfg, 0, sizeof(pcs_regmap_cfg));
-       pcs_regmap_cfg.reg_bits = 16;
-       pcs_regmap_cfg.val_bits = 16;
-       pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1);
-
        /* Create a regmap for the PCS so that it can be used by the PCS driver,
         * if we have such a PCS
         */
        if (dwmac->tse_pcs_base) {
+               struct regmap_config pcs_regmap_cfg;
                struct mdio_regmap_config mrc;
                struct regmap *pcs_regmap;
                struct mii_bus *pcs_bus;
 
+               memset(&pcs_regmap_cfg, 0, sizeof(pcs_regmap_cfg));
+               memset(&mrc, 0, sizeof(mrc));
+
+               pcs_regmap_cfg.reg_bits = 16;
+               pcs_regmap_cfg.val_bits = 16;
+               pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1);
+
                pcs_regmap = devm_regmap_init_mmio(&pdev->dev, dwmac->tse_pcs_base,
                                                   &pcs_regmap_cfg);
                if (IS_ERR(pcs_regmap)) {
@@ -470,6 +472,7 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
                mrc.regmap = pcs_regmap;
                mrc.parent = &pdev->dev;
                mrc.valid_addr = 0x0;
+               mrc.autoscan = false;
 
                snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii", ndev->name);
                pcs_bus = devm_mdio_regmap_register(&pdev->dev, &mrc);