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| author |   Russell King <rmk+kernel@armlinux.org.uk> | 2020-08-28 11:53:53 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-08-31 12:23:16 -0700 |
| commit | e859a60add1dd3f844c94c7a782c1a16610bd192 (patch) | |
| tree | bb718c235372164857750051ad3c79835423537d /drivers/net/phy/phylink.c | |
| parent | Merge branch 'hinic-add-debugfs-support' (diff) | |
| download | linux-dev-e859a60add1dd3f844c94c7a782c1a16610bd192.tar.xz linux-dev-e859a60add1dd3f844c94c7a782c1a16610bd192.zip | |
net: phylink: avoid oops during initialisation
If we intend to use PCS operations, mac_pcs_get_state() will not be
implemented, so will be NULL. If we also intend to register the PCS
operations in mac_prepare() or mac_config(), then this leads to an
attempt to call NULL function pointer during phylink_start(). Avoid
this, but we must report the link is down.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/phylink.c')
| -rw-r--r-- | drivers/net/phy/phylink.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 32b4bd6a5b55..5e4cb12972eb 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -535,8 +535,10 @@ static void phylink_mac_pcs_get_state(struct phylink *pl, if (pl->pcs_ops) pl->pcs_ops->pcs_get_state(pl->pcs, state); - else + else if (pl->mac_ops->mac_pcs_get_state) pl->mac_ops->mac_pcs_get_state(pl->config, state); + else + state->link = 0; } /* The fixed state is... fixed except for the link state, |