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| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-09-17 16:36:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:24 +0300 |
| commit | 1a1028f896465d19d26f93fe16e6b4a0b5ba903b (patch) | |
| tree | 9fbacd13ed23e6948f8fe2f4829a3c53fa3431d6 /drivers/net/phy | |
| parent | 02113c83f405c37896d57856a7e1d2fc492e7d36 (diff) | |
| download | linux-1a1028f896465d19d26f93fe16e6b4a0b5ba903b.tar.xz | |
net: phylink: don't call netif_carrier_off() with NULL netdev
[ Upstream commit cbcca2e3961eac736566ac13ef0d0bf6f0b764ec ]
Dan Carpenter points out that we have a code path that permits a NULL
netdev pointer to be passed to netif_carrier_off(), which will cause
a kernel oops. In any case, we need to set pl->old_link_state to false
to have the desired effect when there is no netdev present.
Fixes: f97493657c63 ("net: phylink: add suspend/resume support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/phylink.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 0a0abe8e4be0..5a58c77d0002 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -1333,7 +1333,10 @@ void phylink_suspend(struct phylink *pl, bool mac_wol) * but one would hope all packets have been sent. This * also means phylink_resolve() will do nothing. */ - netif_carrier_off(pl->netdev); + if (pl->netdev) + netif_carrier_off(pl->netdev); + else + pl->old_link_state = false; /* We do not call mac_link_down() here as we want the * link to remain up to receive the WoL packets. |