[PATCH v1] phy: avoid adjust_link call if link remains down
Oleksij Rempel
o.rempel at pengutronix.de
Tue May 28 22:03:40 PDT 2024
Add a check in phy_update_status to skip calling adjust_link when the
link status remains down. This prevents unnecessary adjust_link calls
for PHYs that may change speed and duplex status bits before confirming
link establishment. This issue was observed during debugging a switch
driver, where a PHY took about 6 seconds to establish a link, causing
multiple adjust_link calls.
Signed-off-by: Oleksij Rempel <o.rempel at pengutronix.de>
---
drivers/net/phy/phy.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index abd78b2c80..39a48e1519 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -62,6 +62,9 @@ int phy_update_status(struct phy_device *phydev)
phydev->link == oldlink)
return 0;
+ if (!phydev->link && phydev->link == oldlink)
+ return 0;
+
if (phydev->adjust_link)
phydev->adjust_link(edev);
--
2.39.2
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