diff options
| author | Maxime Chevallier <maxime.chevallier@bootlin.com> | 2025-03-21 11:35:01 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-03-24 13:26:02 -0700 |
| commit | 53cd6820f5a05dd7f982f7da85af7d185b3e4992 (patch) | |
| tree | 7d636f62b0f15b4c0bfe27c505f70cd142d52d70 | |
| parent | c61209eeb0b382f6a605160f06285fec7e3415e2 (diff) | |
net: stmmac: Call xpcs_config_eee_mult_fact() only when xpcs is present
Some dwmac variants such as dwmac_socfpga don't use xpcs but lynx_pcs.
Don't call xpcs_config_eee_mult_fact() in this case, as this causes a
crash at init :
Unable to handle kernel NULL pointer dereference at virtual address 00000039 when write
[...]
Call trace:
xpcs_config_eee_mult_fact from stmmac_pcs_setup+0x40/0x10c
stmmac_pcs_setup from stmmac_dvr_probe+0xc0c/0x1244
stmmac_dvr_probe from socfpga_dwmac_probe+0x130/0x1bc
socfpga_dwmac_probe from platform_probe+0x5c/0xb0
Fixes: 060fb27060e8 ("net: stmmac: call xpcs_config_eee_mult_fact()")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20250321103502.1303539-1-maxime.chevallier@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c index 7c0a4046bbe3..836f2848dfeb 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c @@ -524,7 +524,8 @@ int stmmac_pcs_setup(struct net_device *ndev) if (ret) return dev_err_probe(priv->device, ret, "No xPCS found\n"); - xpcs_config_eee_mult_fact(xpcs, priv->plat->mult_fact_100ns); + if (xpcs) + xpcs_config_eee_mult_fact(xpcs, priv->plat->mult_fact_100ns); priv->hw->xpcs = xpcs; |