From: Samuel Holland samuel@sholland.org
[ Upstream commit 7eeecc4b1f480c7ba1932cb9a7693f8c452640f2 ]
stmmac_pltfr_remove does three things in one function, making it inapproprate for unwinding the steps in the probe function. Currently, a failure before the call to stmmac_dvr_probe would leak OF node references due to missing a call to stmmac_remove_config_dt. And an error in stmmac_dvr_probe would cause the driver to attempt to remove a netdevice that was never added. Fix these by reordering the init and splitting out the error handling steps.
Fixes: 9f93ac8d4085 ("net-next: stmmac: Add dwmac-sun8i") Fixes: 40a1dcee2d18 ("net: ethernet: dwmac-sun8i: Use the correct function in exit path") Signed-off-by: Samuel Holland samuel@sholland.org Reviewed-by: Chen-Yu Tsai wens@csie.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 25 +++++++++++++--------- 1 file changed, 15 insertions(+), 10 deletions(-)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c @@ -1134,10 +1134,6 @@ static int sun8i_dwmac_probe(struct plat if (ret) return ret;
- plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac); - if (IS_ERR(plat_dat)) - return PTR_ERR(plat_dat); - gmac = devm_kzalloc(dev, sizeof(*gmac), GFP_KERNEL); if (!gmac) return -ENOMEM; @@ -1201,11 +1197,15 @@ static int sun8i_dwmac_probe(struct plat ret = of_get_phy_mode(dev->of_node, &interface); if (ret) return -EINVAL; - plat_dat->interface = interface; + + plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac); + if (IS_ERR(plat_dat)) + return PTR_ERR(plat_dat);
/* platform data specifying hardware features and callbacks. * hardware features were copied from Allwinner drivers. */ + plat_dat->interface = interface; plat_dat->rx_coe = STMMAC_RX_COE_TYPE2; plat_dat->tx_coe = 1; plat_dat->has_sun8i = true; @@ -1216,7 +1216,7 @@ static int sun8i_dwmac_probe(struct plat
ret = sun8i_dwmac_init(pdev, plat_dat->bsp_priv); if (ret) - return ret; + goto dwmac_deconfig;
ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); if (ret) @@ -1230,7 +1230,7 @@ static int sun8i_dwmac_probe(struct plat if (gmac->variant->soc_has_internal_phy) { ret = get_ephy_nodes(priv); if (ret) - goto dwmac_exit; + goto dwmac_remove; ret = sun8i_dwmac_register_mdio_mux(priv); if (ret) { dev_err(&pdev->dev, "Failed to register mux\n"); @@ -1239,15 +1239,20 @@ static int sun8i_dwmac_probe(struct plat } else { ret = sun8i_dwmac_reset(priv); if (ret) - goto dwmac_exit; + goto dwmac_remove; }
return ret; dwmac_mux: sun8i_dwmac_unset_syscon(gmac); +dwmac_remove: + stmmac_dvr_remove(&pdev->dev); dwmac_exit: - stmmac_pltfr_remove(pdev); -return ret; + sun8i_dwmac_exit(pdev, gmac); +dwmac_deconfig: + stmmac_remove_config_dt(pdev, plat_dat); + + return ret; }
static const struct of_device_id sun8i_dwmac_match[] = {