lkml.org 
[lkml]   [2020]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.6 21/71] net: phy: marvell: Fix pause frame negotiation
Date
From: Clemens Gruber <clemens.gruber@pqgruber.com>

[ Upstream commit 3b72f84f8fb65e83e85e9be58eabcf95a40b8f46 ]

The negotiation of flow control / pause frame modes was broken since
commit fcf1f59afc67 ("net: phy: marvell: rearrange to use
genphy_read_lpa()") moved the setting of phydev->duplex below the
phy_resolve_aneg_pause call. Due to a check of DUPLEX_FULL in that
function, phydev->pause was no longer set.

Fix it by moving the parsing of the status variable before the blocks
dealing with the pause frames.

As the Marvell 88E1510 datasheet does not specify the timing between the
link status and the "Speed and Duplex Resolved" bit, we have to force
the link down as long as the resolved bit is not set, to avoid reporting
link up before we even have valid Speed/Duplex.

Tested with a Marvell 88E1510 (RGMII to Copper/1000Base-T)

Fixes: fcf1f59afc67 ("net: phy: marvell: rearrange to use genphy_read_lpa()")
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/phy/marvell.c | 46 ++++++++++++++++++++++++----------------------
1 file changed, 24 insertions(+), 22 deletions(-)

--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1278,6 +1278,30 @@ static int marvell_read_status_page_an(s
int lpa;
int err;

+ if (!(status & MII_M1011_PHY_STATUS_RESOLVED)) {
+ phydev->link = 0;
+ return 0;
+ }
+
+ if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+
+ switch (status & MII_M1011_PHY_STATUS_SPD_MASK) {
+ case MII_M1011_PHY_STATUS_1000:
+ phydev->speed = SPEED_1000;
+ break;
+
+ case MII_M1011_PHY_STATUS_100:
+ phydev->speed = SPEED_100;
+ break;
+
+ default:
+ phydev->speed = SPEED_10;
+ break;
+ }
+
if (!fiber) {
err = genphy_read_lpa(phydev);
if (err < 0)
@@ -1306,28 +1330,6 @@ static int marvell_read_status_page_an(s
}
}

- if (!(status & MII_M1011_PHY_STATUS_RESOLVED))
- return 0;
-
- if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
- phydev->duplex = DUPLEX_FULL;
- else
- phydev->duplex = DUPLEX_HALF;
-
- switch (status & MII_M1011_PHY_STATUS_SPD_MASK) {
- case MII_M1011_PHY_STATUS_1000:
- phydev->speed = SPEED_1000;
- break;
-
- case MII_M1011_PHY_STATUS_100:
- phydev->speed = SPEED_100;
- break;
-
- default:
- phydev->speed = SPEED_10;
- break;
- }
-
return 0;
}


\
 
 \ /
  Last update: 2020-04-20 14:57    [W:0.179 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site