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Subject[PATCH 4.1 11/56] mvneta: add forgotten initialization of autonegotiation bits
Date
4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stas Sergeev <stsp@list.ru>

[ Upstream commit 538761b794c1542f1c6e31eadd9d7aae118889f7 ]

The commit 898b2970e2c9 ("mvneta: implement SGMII-based in-band link state
signaling")
changed mvneta_adjust_link() so that it does not clear the auto-negotiation
bits in MVNETA_GMAC_AUTONEG_CONFIG register. This was necessary for
auto-negotiation mode to work.
Unfortunately I haven't checked if these bits are ever initialized.
It appears they are not.
This patch adds the missing initialization of the auto-negotiation bits
in the MVNETA_GMAC_AUTONEG_CONFIG register.
It fixes the following regression:
https://www.mail-archive.com/netdev@vger.kernel.org/msg67928.html

Since the patch was tested to fix a regression, it should be applied to
stable tree.

Tested-by: Arnaud Ebalard <arno@natisbad.org>

CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
CC: Florian Fainelli <f.fainelli@gmail.com>
CC: netdev@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: stable@vger.kernel.org

Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/marvell/mvneta.c | 6 ++++++
1 file changed, 6 insertions(+)

--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -1013,6 +1013,12 @@ static void mvneta_defaults_set(struct m
val = mvreg_read(pp, MVNETA_GMAC_CLOCK_DIVIDER);
val |= MVNETA_GMAC_1MS_CLOCK_ENABLE;
mvreg_write(pp, MVNETA_GMAC_CLOCK_DIVIDER, val);
+ } else {
+ val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG);
+ val &= ~(MVNETA_GMAC_INBAND_AN_ENABLE |
+ MVNETA_GMAC_AN_SPEED_EN |
+ MVNETA_GMAC_AN_DUPLEX_EN);
+ mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val);
}

mvneta_set_ucast_table(pp, -1);



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