netdev - Re: [PATCH net] net: dsa: bcm_sf2: Fix ageing conditions and operation

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Date:	Tue, 08 Sep 2015 22:28:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	f.fainelli@...il.com
Cc:	netdev@...r.kernel.org, vivien.didelot@...oirfairelinux.com,
	linux@...ck-us.net, andrew@...n.ch
Subject: Re: [PATCH net] net: dsa: bcm_sf2: Fix ageing conditions and
 operation

From: Florian Fainelli <f.fainelli@...il.com>
Date: Sat,  5 Sep 2015 13:07:27 -0700

> The comparison check between cur_hw_state and hw_state is currently
> invalid because cur_hw_state is right shifted by G_MISTP_SHIFT, while
> hw_state is not, so we end-up comparing bits 2:0 with bits 7:5, which is
> going to cause an additional aging to occur. Fix this by not shifting
> cur_hw_state while reading it, but instead, mask the value with the
> appropriately shitfted bitmask.
> 
> The other problem with the fast-ageing process is that we did not set
> the EN_AGE_DYNAMIC bit to request the ageing to occur for dynamically
> learned MAC addresses. Finally, write back 0 to the FAST_AGE_CTRL
> register to avoid leaving spurious bits sets from one operation to the
> other.
> 
> Fixes: 12f460f23423 ("net: dsa: bcm_sf2: add HW bridging support")
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---
> David, this dates back to 4.1, could you queue this for -stable?

Applied and queued up for -stable, thanks!
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