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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-07-08 10:49:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-28 08:00:05 -0700 |
| commit | 8a8d269dd25aa12c24c76c99efea9f63edb88a90 (patch) | |
| tree | 3579a33d2a0217c0ebaa725de03cb0f666772fce /drivers | |
| parent | d5f758a35b50da3c1629c18b149d23ef99c91f70 (diff) | |
| download | linux-3.10-8a8d269dd25aa12c24c76c99efea9f63edb88a90.tar.gz linux-3.10-8a8d269dd25aa12c24c76c99efea9f63edb88a90.tar.bz2 linux-3.10-8a8d269dd25aa12c24c76c99efea9f63edb88a90.zip | |
net: mvneta: fix operation in 10 Mbit/s mode
[ Upstream commit 4d12bc63ab5e48c1d78fa13883cf6fefcea3afb1 ]
As reported by Maggie Mae Roxas, the mvneta driver doesn't behave
properly in 10 Mbit/s mode. This is due to a misconfiguration of the
MVNETA_GMAC_AUTONEG_CONFIG register: bit MVNETA_GMAC_CONFIG_MII_SPEED
must be set for a 100 Mbit/s speed, but cleared for a 10 Mbit/s speed,
which the driver was not properly doing. This commit adjusts that by
setting the MVNETA_GMAC_CONFIG_MII_SPEED bit only in 100 Mbit/s mode,
and relying on the fact that all the speed related bits of this
register are cleared at the beginning of the mvneta_adjust_link()
function.
This problem exists since c5aff18204da0 ("net: mvneta: driver for
Marvell Armada 370/XP network unit") which is the commit that
introduced the mvneta driver in the kernel.
Cc: <stable@vger.kernel.org> # v3.8+
Fixes: c5aff18204da0 ("net: mvneta: driver for Marvell Armada 370/XP network unit")
Reported-by: Maggie Mae Roxas <maggie.mae.roxas@gmail.com>
Cc: Maggie Mae Roxas <maggie.mae.roxas@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvneta.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index a602aeeb3ac..dd33a112f47 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -2306,7 +2306,7 @@ static void mvneta_adjust_link(struct net_device *ndev) if (phydev->speed == SPEED_1000) val |= MVNETA_GMAC_CONFIG_GMII_SPEED; - else + else if (phydev->speed == SPEED_100) val |= MVNETA_GMAC_CONFIG_MII_SPEED; mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); |