[PATCH] net: mvneta: fix operation in 10 Mbit/s mode

[David Miller]

From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date: Tue,  8 Jul 2014 10:49:43 +0200

> 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 at 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 at gmail.com>
> Cc: Maggie Mae Roxas <maggie.mae.roxas at gmail.com>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>

Applied and queued up for -stable, thanks.