Messages in this thread Patch in this message | | | From | Yizhuo <> | Subject | [PATCH] net: stmmac: dwmac-sun8i: Variable "val" in function sun8i_dwmac_set_syscon() could be uninitialized | Date | Fri, 30 Aug 2019 19:00:48 -0700 |
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In function sun8i_dwmac_set_syscon(), local variable "val" could be uninitialized if function regmap_field_read() returns -EINVAL. However, it will be used directly in the if statement, which is potentially unsafe.
Signed-off-by: Yizhuo <yzhai003@ucr.edu> --- drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c index 4083019c547a..f97a4096f8fc 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c @@ -873,7 +873,12 @@ static int sun8i_dwmac_set_syscon(struct stmmac_priv *priv) int ret; u32 reg, val; - regmap_field_read(gmac->regmap_field, &val); + ret = regmap_field_read(gmac->regmap_field, &val); + if (ret) { + dev_err(priv->device, "Fail to read from regmap field.\n"); + return ret; + } + reg = gmac->variant->default_syscon_value; if (reg != val) dev_warn(priv->device, -- 2.17.1
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