On Thu, May 25, 2023 at 12:11:23PM +0200, Maxime Chevallier wrote:

+struct mii_bus *devm_mdio_regmap_register(struct device *dev,
+					  const struct mdio_regmap_config *config)
+{
+	struct mdio_regmap_config *mrc;
+	struct mii_bus *mii;
+	int rc;
+
+	if (!config->parent)
+		return ERR_PTR(-EINVAL);
+
+	mii = devm_mdiobus_alloc_size(config->parent, sizeof(*mrc));
+	if (!mii)
+		return ERR_PTR(-ENOMEM);
+
+	mrc = mii->priv;
+	memcpy(mrc, config, sizeof(*mrc));
+
+	mrc->regmap = config->regmap;
+	mrc->valid_addr = config->valid_addr;

You have just memcpy'd everything from config into mrc. Doesn't this
already include "regmap" and "valid_addr" ?

However, these are the only two things used, so does it really make
sense to allocate the full mdio_regmap_config structure, or would a
smaller data structure (of one pointer and one u8) be more appropriate?

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