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net: stmmac: fix double serdes powerdown

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[ Upstream commit c4fc88ad2a765224a648db8ab35f125e120fe41b ]

Commit 49725ffc15fc ("net: stmmac: power up/down serdes in
stmmac_open/release") correctly added a call to the serdes_powerdown()
callback to stmmac_release() but did not remove the one from
stmmac_remove() which leads to a doubled call to serdes_powerdown().

This can lead to all kinds of problems: in the case of the qcom ethqos
driver, it caused an unbalanced regulator disable splat.

Fixes: 49725ffc15fc ("net: stmmac: power up/down serdes in stmmac_open/release")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Junxiao Chang <junxiao.chang@intel.com>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Andrew Halaney <ahalaney@redhat.com>
Link: https://lore.kernel.org/r/20230621135537.376649-1-brgl@bgdev.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bartosz Golaszewski 2023-06-21 15:55:37 +02:00 committed by Greg Kroah-Hartman
parent 1ba91ffa1a
commit 0c9e48428f
1 changed files with 0 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -5254,12 +5254,6 @@ int stmmac_dvr_remove(struct device *dev)
netif_carrier_off(ndev);
unregister_netdev(ndev);
/* Serdes power down needs to happen after VLAN filter
* is deleted that is triggered by unregister_netdev().
*/
if (priv->plat->serdes_powerdown)
priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv);
#ifdef CONFIG_DEBUG_FS
stmmac_exit_fs(ndev);
#endif