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Message-Id: <20190211141911.336766246@linuxfoundation.org>
Date: Mon, 11 Feb 2019 15:19:10 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Russell King <rmk+kernel@...linux.org.uk>,
Yonglong Liu <liuyonglong@...wei.com>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.19 270/313] Revert "net: phy: marvell: avoid pause mode on SGMII-to-Copper for 88e151x"
4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Russell King <rmk+kernel@...linux.org.uk>
[ Upstream commit c14f07c6211cc01d52ed92cce1fade5071b8d197 ]
This reverts commit 6623c0fba10ef45b64ca213ad5dec926f37fa9a0.
The original diagnosis was incorrect: it appears that the NIC had
PHY polling mode enabled, which meant that it overwrote the PHYs
advertisement register during negotiation.
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
Tested-by: Yonglong Liu <liuyonglong@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/phy/marvell.c | 12 ------------
1 file changed, 12 deletions(-)
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -868,8 +868,6 @@ static int m88e1510_config_init(struct p
/* SGMII-to-Copper mode initialization */
if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
- u32 pause;
-
/* Select page 18 */
err = marvell_set_page(phydev, 18);
if (err < 0)
@@ -892,16 +890,6 @@ static int m88e1510_config_init(struct p
err = marvell_set_page(phydev, MII_MARVELL_COPPER_PAGE);
if (err < 0)
return err;
-
- /* There appears to be a bug in the 88e1512 when used in
- * SGMII to copper mode, where the AN advertisement register
- * clears the pause bits each time a negotiation occurs.
- * This means we can never be truely sure what was advertised,
- * so disable Pause support.
- */
- pause = SUPPORTED_Pause | SUPPORTED_Asym_Pause;
- phydev->supported &= ~pause;
- phydev->advertising &= ~pause;
}
return m88e1318_config_init(phydev);
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