From: Romain Naour Date: Tue, 8 Oct 2024 07:54:25 +0000 (+0200) Subject: net: ksz9477: remove dev_set_parent_priv() call X-Git-Url: http://git.dujemihanovic.xyz/html/%7B%7B%20.Permalink%20%7D%7D?a=commitdiff_plain;h=5b87af441f8ef5e5c74fbb4337e1f42816b73189;p=u-boot.git net: ksz9477: remove dev_set_parent_priv() call The ksz9477 is currently the only driver using dev_set_parent_priv() outside of the driver model. Also, there was no explanation in the commit adding ksz9477 driver and why dev_set_parent_priv() is required. Actually there is a typo in ksz_mdio_probe() while retrieving the parent (switch@0) private data: - priv->ksz = dev_get_parent_priv(dev->parent); + priv->ksz = dev_get_priv(dev->parent); Printing the address of struct ksz_dsa_priv *priv allows to notice the slight difference: ksz_i2c_probe: ksz_dsa_priv *priv 0xfdf45768 // address of the saved priv ksz_mdio_bind: ksz_dsa_priv *priv 0xfdf45798 // address returned by dev_get_parent_priv(dev->parent) ksz_mdio_bind: ksz_dsa_priv *priv 0xfdf45768 // address returned by dev_get_priv(dev->parent) The ksz_mdio driver get the wrong data and without dev_set_parent_priv() the mdio driver fail to access the underlying bus. While it doesn't cause any issue with I2C bus, it override the per-child data used by the SPI bus (struct spi_slave) and prevent further bus access (even with sspi command). Signed-off-by: Romain Naour --- diff --git a/drivers/net/ksz9477.c b/drivers/net/ksz9477.c index 091e968948..e67012a071 100644 --- a/drivers/net/ksz9477.c +++ b/drivers/net/ksz9477.c @@ -276,7 +276,7 @@ static int ksz_mdio_probe(struct udevice *dev) struct ksz_mdio_priv *priv = dev_get_priv(dev); dev_dbg(dev, "%s\n", __func__); - priv->ksz = dev_get_parent_priv(dev->parent); + priv->ksz = dev_get_priv(dev->parent); return 0; } @@ -514,8 +514,6 @@ static int ksz_i2c_probe(struct udevice *dev) u8 data8; u32 id; - dev_set_parent_priv(dev, priv); - ret = i2c_set_chip_offset_len(dev, 2); if (ret) { printf("i2c_set_chip_offset_len failed: %d\n", ret);