linux-kernel - Re: [PATCH net-next] net: ethernet: ti: cpsw: don't flush mcast entries while switch promisc mode

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Date:   Fri, 19 Oct 2018 23:28:44 +0300
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     Grygorii Strashko <grygorii.strashko@...com>, davem@...emloft.net,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: ethernet: ti: cpsw: don't flush mcast
 entries while switch promisc mode

Grygorii,

On Fri, Oct 19, 2018 at 10:24:55PM +0300, Ivan Khoronzhuk wrote:
>On Fri, Oct 19, 2018 at 12:23:28PM -0500, Grygorii Strashko wrote:
>>
>>
>>On 10/19/18 7:04 AM, Ivan Khoronzhuk wrote:
>>>On Thu, Oct 18, 2018 at 07:03:06PM -0500, Grygorii Strashko wrote:
>>>>
>>>>
>>>>On 10/18/18 1:00 PM, Ivan Khoronzhuk wrote:
>>>>>No need now to flush mcast entries in switch mode while toggling to
>>>>>promiscuous mode. It's not needed as vlan reg_mcast = ALL_PORTS
>>>>>and mcast/vlan ports = ALL_PORTS, the same happening for vlan
>>>>>unreg_mcast, it's set to ALL_PORT_MASK just after calling promisc
>>>>>mode routine by calling set allmulti. I suppose main reason to flush
>>>>>them is to use unreg_mcast to receive all to host port. Thus, now, all
>>>>>mcast packets are received anyway and no reason to flush mcast entries
>>>>>unsafely, as they were synced with __dev_mc_sync() previously and are
>>>>>not restored. Another way is to _dev_mc_unsync() them, but no need.

I've sent new patch achiving the same but with second viariant described
in this cover letter. Please, look at it. No rush.

-- 
Regards,
Ivan Khoronzhuk