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Date:	Sat, 03 Nov 2012 15:38:13 -0400 (EDT)
From:	David Miller <>
Subject: Re: [PATCH net-next] macb: Keep driver's speed/duplex in sync with
 actual NCFGR

From: Vitalii Demianets <>
Date: Fri, 2 Nov 2012 19:09:24 +0200

> When underlying phy driver restores its state very fast after being brought 
> down and up so that macb driver function macb_handle_link_change() was never 
> called with link state "down", driver's internal representation of phy speed 
> and duplex (bp->speed and bp->duplex) didn't change. So, macb driver sees no 
> reason to perform actual write to the NCFGR register, although the speed and 
> duplex settings in that register were reset when interface was brought down 
> and up. In that case actual phy speed and duplex differ from NCFGR settings.
> The patch fixes that by keeping internal driver representation of speed and 
> duplex in sync with actual content of NCFGR.
> Signed-off-by: Vitalii Demianets <>

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