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net: dsa: mv88e6xxx: Longer timeout for PTP TX timestamp

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For slow processors using bit-banging MDIO, 20ms can be too short a
timeout when waiting for the transmit timestamp to become
available. Double it to 40ms.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-07-18 22:38:27 +02:00 committed by David S. Miller
parent 2dbed245b4
commit df31b74ce1
1 changed files with 1 additions and 1 deletions
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2
drivers/net/dsa/mv88e6xxx/hwtstamp.c
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@ -65,7 +65,7 @@ static int mv88e6xxx_ptp_read(struct mv88e6xxx_chip *chip, int addr,
* within 1ms. Software may enounter delays due to MDIO contention, so
* the timeout is set accordingly.
*/
#define TX_TSTAMP_TIMEOUT msecs_to_jiffies(20)
#define TX_TSTAMP_TIMEOUT msecs_to_jiffies(40)
int mv88e6xxx_get_ts_info(struct dsa_switch *ds, int port,
struct ethtool_ts_info *info)