If we fail to probe for whatever reason, we cannot unregister/free the MII bus unless we registered it with fec_get_miibus. This fixes FECs sharing an MDIO bus from destroying it, preventing the other FEC from using it.
Fixes: 6a895d039b ("net: Update eQos driver and FEC driver to use eth phy interfaces") Signed-off-by: Sean Anderson sean.anderson@seco.com Reviewed-by: Ramon Fried rfried.dev@gmail.com
---
(no changes since v1)
drivers/net/fec_mxc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c index 59f5a14e54..4fd5c01b4a 100644 --- a/drivers/net/fec_mxc.c +++ b/drivers/net/fec_mxc.c @@ -1355,6 +1355,7 @@ static void fec_gpio_reset(struct fec_priv *priv)
static int fecmxc_probe(struct udevice *dev) { + bool dm_mii_bus = true; struct eth_pdata *pdata = dev_get_plat(dev); struct fec_priv *priv = dev_get_priv(dev); struct mii_dev *bus = NULL; @@ -1462,6 +1463,7 @@ static int fecmxc_probe(struct udevice *dev) #endif
if (!bus) { + dm_mii_bus = false; #ifdef CONFIG_FEC_MXC_MDIO_BASE bus = fec_get_miibus((ulong)CONFIG_FEC_MXC_MDIO_BASE, dev_seq(dev)); @@ -1507,8 +1509,10 @@ static int fecmxc_probe(struct udevice *dev) return 0;
err_phy: - mdio_unregister(bus); - free(bus); + if (!dm_mii_bus) { + mdio_unregister(bus); + free(bus); + } err_mii: err_timeout: fec_free_descs(priv);