netdev - Re: [PATCH net] gianfar: Restore link state settings after MAC reset

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Message-Id: <20150813.212641.807345031571015710.davem@davemloft.net>
Date:	Thu, 13 Aug 2015 21:26:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	claudiu.manoil@...escale.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net] gianfar: Restore link state settings after MAC
 reset

From: Claudiu Manoil <claudiu.manoil@...escale.com>
Date: Thu, 13 Aug 2015 16:50:37 +0300

> There are some MAC registers that need to be kept in sync
> with the link state parameters, see adjust_link().
> However, after a MAC soft reset default values for
> these registers are assumed.  In some cases (excepting
> if down/ if up for example) adjust_link() does not see
> that these values were reset to default because the
> priv->old* link parameters were left unchanged.
> So, reset the priv->old* link params as well during a
> MAC reset to let adjust_link() restore the MAC link
> settings to the actual link state values.
> 
> Fixes following case, for example:
> Setting link to 100M, changing MTU (implies MAC reset),
> link state remains unchanged to 100M but MAC registers
> were reset to default (1G) breaking the connectivity w/
> the PHY.  Closing and re-opening the interface would
> restore the MAC link parameters to the correct values.
> 
> Signed-off-by: Claudiu Manoil <claudiu.manoil@...escale.com>

Applied, thanks.
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