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net: dsa: mv88e6xxx: error handling for serdes_power functions

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Added default case to handle undefined cmode scenario in
mv88e6393x_serdes_power() and mv88e6393x_serdes_power() methods.

Addresses-Coverity: 1494644 ("Uninitialized scalar variable")
Fixes: 21635d9203 (net: dsa: mv88e6xxx: Fix application of erratum 4.8 for 88E6393X)
Reviewed-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Ameer Hamza <amhamza.mgc@gmail.com>
Link: https://lore.kernel.org/r/20211209041552.9810-1-amhamza.mgc@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ameer Hamza 2021-12-09 09:15:52 +05:00 committed by Jakub Kicinski
parent 8d6b32aafc
commit 0416e7af23
1 changed files with 7 additions and 1 deletions
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8
drivers/net/dsa/mv88e6xxx/serdes.c
View file

@ -830,7 +830,7 @@ int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
bool up)
{
u8 cmode = chip->ports[port].cmode;
int err = 0;
int err;
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
@ -842,6 +842,9 @@ int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
case MV88E6XXX_PORT_STS_CMODE_RXAUI:
err = mv88e6390_serdes_power_10g(chip, lane, up);
break;
default:
err = -EINVAL;
break;
}
if (!err && up)
@ -1541,6 +1544,9 @@ int mv88e6393x_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
case MV88E6393X_PORT_STS_CMODE_10GBASER:
err = mv88e6390_serdes_power_10g(chip, lane, on);
break;
default:
err = -EINVAL;
break;
}
if (err)