diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2025-02-28 11:11:58 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2025-04-04 14:39:30 +0100 |
| commit | ea08d4f3e197716211dff435e5eae499965260cd (patch) | |
| tree | 0ee53d21a2a5087675c54fbc062c9d35273ea1b6 /drivers | |
| parent | 45a52c56f31d429a9619f18b68e53d3165b7d137 (diff) | |
net: stmmac: remove redundant racy tear-down in stmmac_dvr_remove()
While the network device is registered, it is published to userspace,
and thus userspace can change its state. This means calling
functions such as stmmac_stop_all_dma() and stmmac_mac_set() are
racy.
Moreover, unregister_netdev() will unpublish the network device, and
then if appropriate call the .ndo_stop() method, which is
stmmac_release(). This will first call phylink_stop() which will
synchronously take the link down, resulting in stmmac_mac_link_down()
and stmmac_mac_set(, false) being called.
stmmac_release() will also call stmmac_stop_all_dma().
Consequently, neither of these two functions need to called prior
to unregister_netdev() as that will safely call paths that will
result in this work being done if necessary.
Remove these redundant racy calls.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Furong Xu <0x1207@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index aba4075f3665..afce4e10354c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -7744,8 +7744,6 @@ void stmmac_dvr_remove(struct device *dev) pm_runtime_get_sync(dev); - stmmac_stop_all_dma(priv); - stmmac_mac_set(priv, priv->ioaddr, false); unregister_netdev(ndev); #ifdef CONFIG_DEBUG_FS |