This is a note to let you know that I've just added the patch titled
mvneta: add forgotten initialization of autonegotiation bits
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mvneta-add-forgotten-initialization-of-autonegotiation-bits.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Jul 3 20:00:25 PDT 2015
From: Stas Sergeev <stsp@xxxxxxx>
Date: Thu, 18 Jun 2015 18:36:03 +0300
Subject: mvneta: add forgotten initialization of autonegotiation bits
From: Stas Sergeev <stsp@xxxxxxx>
[ 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@xxxxxxxxxxxxxxx/msg67928.html
Since the patch was tested to fix a regression, it should be applied to
stable tree.
Tested-by: Arnaud Ebalard <arno@xxxxxxxxxxxx>
CC: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
CC: Florian Fainelli <f.fainelli@xxxxxxxxx>
CC: netdev@xxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Stas Sergeev <stsp@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
Patches currently in stable-queue which might be from stsp@xxxxxxx are
queue-4.1/mvneta-add-forgotten-initialization-of-autonegotiation-bits.patch
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