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net: dsa: mv88e6xxx: Remove set but unused variable

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We don't act on any errors reading registers while handling watchdog
interrupt. Since this is an interrupt handler, we cannot return such
errors. So just remove the variable.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2020-07-05 21:38:09 +02:00 committed by David S. Miller
parent 048442807a
commit b672b35143
1 changed files with 2 additions and 3 deletions
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5
drivers/net/dsa/mv88e6xxx/global2.c
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@ -876,19 +876,18 @@ static int mv88e6390_watchdog_setup(struct mv88e6xxx_chip *chip)
static int mv88e6390_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
{
int err;
u16 reg;
mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
MV88E6390_G2_WDOG_CTL_PTR_EVENT);
err = mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, &reg);
mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, &reg);
dev_info(chip->dev, "Watchdog event: 0x%04x",
reg & MV88E6390_G2_WDOG_CTL_DATA_MASK);
mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
MV88E6390_G2_WDOG_CTL_PTR_HISTORY);
err = mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, &reg);
mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, &reg);
dev_info(chip->dev, "Watchdog history: 0x%04x",
reg & MV88E6390_G2_WDOG_CTL_DATA_MASK);