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net: dsa: mv88e6xxx: add an error code check in mv88e6352_tai_event_work

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mv88e6xxx_tai_write() can return error code (-EOPNOTSUPP ...) if failed.
So check the value of 'ret' after calling mv88e6xxx_tai_write().

Signed-off-by: Su Hui <suhui@nfschina.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Su Hui 2023-10-20 17:00:04 +08:00 committed by David S. Miller
parent ee3d122854
commit a792197f50
1 changed files with 4 additions and 0 deletions
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4
drivers/net/dsa/mv88e6xxx/ptp.c
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@ -182,6 +182,10 @@ static void mv88e6352_tai_event_work(struct work_struct *ugly)
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_tai_write(chip, MV88E6XXX_TAI_EVENT_STATUS, status[0]);
mv88e6xxx_reg_unlock(chip);
if (err) {
dev_err(chip->dev, "failed to write TAI status register\n");
return;
}
/* This is an external timestamp */
ev.type = PTP_CLOCK_EXTTS;