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From: Greg KH <gregkh@linuxfoundation.org>
To: DENG Qingfang <dqfext@gmail.com>
Cc: Sasha Levin <sashal@kernel.org>,
	stable@vger.kernel.org, Sean Wang <sean.wang@mediatek.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@savoirfairelinux.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"open list:MEDIATEK SWITCH DRIVER" <netdev@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-arm-kernel@lists.infradead.org>,
	 "moderated list:ARM/Mediatek SoC support"
	<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH 4.19.y] net: dsa: mt7530: disable learning on standalone ports
Date: Fri, 27 Aug 2021 12:19:23 +0200	[thread overview]
Message-ID: <YSi8Ky3GqBjnxbhC@kroah.com> (raw)
In-Reply-To: <CALW65ja3hYGmEqcWZzifP2-0WsJOnxcUXsey2ZH5vDbD0-nDeQ@mail.gmail.com>

On Tue, Aug 24, 2021 at 11:57:53PM +0800, DENG Qingfang wrote:
> Hi Sasha,
> 
> On Tue, Aug 24, 2021 at 11:29 PM Sasha Levin <sashal@kernel.org> wrote:
> > What's the reasoning behind:
> >
> > 1. Backporting this patch?
> 
> Standalone ports should have address learning disabled, according to
> the documentation:
> https://www.kernel.org/doc/html/v5.14-rc7/networking/dsa/dsa.html#bridge-layer
> dsa_switch_ops on 5.10 or earlier does not have .port_bridge_flags
> function so it has to be done differently.
> 
> I've identified an issue related to this.

What issue is that?  Where was it reported?

> > 2. A partial backport of this patch?
> 
> The other part does not actually fix anything.

Then why is it not ok to just take the whole thing?

When backporting not-identical-patches, something almost always goes
wrong, so we prefer to take the original commit when ever possible.

thanks,

greg k-h

_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: DENG Qingfang <dqfext@gmail.com>
Cc: Sasha Levin <sashal@kernel.org>,
	stable@vger.kernel.org, Sean Wang <sean.wang@mediatek.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@savoirfairelinux.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"open list:MEDIATEK SWITCH DRIVER" <netdev@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-arm-kernel@lists.infradead.org>,
	 "moderated list:ARM/Mediatek SoC support"
	<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH 4.19.y] net: dsa: mt7530: disable learning on standalone ports
Date: Fri, 27 Aug 2021 12:19:23 +0200	[thread overview]
Message-ID: <YSi8Ky3GqBjnxbhC@kroah.com> (raw)
In-Reply-To: <CALW65ja3hYGmEqcWZzifP2-0WsJOnxcUXsey2ZH5vDbD0-nDeQ@mail.gmail.com>

On Tue, Aug 24, 2021 at 11:57:53PM +0800, DENG Qingfang wrote:
> Hi Sasha,
> 
> On Tue, Aug 24, 2021 at 11:29 PM Sasha Levin <sashal@kernel.org> wrote:
> > What's the reasoning behind:
> >
> > 1. Backporting this patch?
> 
> Standalone ports should have address learning disabled, according to
> the documentation:
> https://www.kernel.org/doc/html/v5.14-rc7/networking/dsa/dsa.html#bridge-layer
> dsa_switch_ops on 5.10 or earlier does not have .port_bridge_flags
> function so it has to be done differently.
> 
> I've identified an issue related to this.

What issue is that?  Where was it reported?

> > 2. A partial backport of this patch?
> 
> The other part does not actually fix anything.

Then why is it not ok to just take the whole thing?

When backporting not-identical-patches, something almost always goes
wrong, so we prefer to take the original commit when ever possible.

thanks,

greg k-h

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: DENG Qingfang <dqfext@gmail.com>
Cc: Sasha Levin <sashal@kernel.org>,
	stable@vger.kernel.org, Sean Wang <sean.wang@mediatek.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@savoirfairelinux.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"open list:MEDIATEK SWITCH DRIVER" <netdev@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	"moderated list:ARM/Mediatek SoC support" 
	<linux-arm-kernel@lists.infradead.org>,
	"moderated list:ARM/Mediatek SoC support" 
	<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH 4.19.y] net: dsa: mt7530: disable learning on standalone ports
Date: Fri, 27 Aug 2021 12:19:23 +0200	[thread overview]
Message-ID: <YSi8Ky3GqBjnxbhC@kroah.com> (raw)
In-Reply-To: <CALW65ja3hYGmEqcWZzifP2-0WsJOnxcUXsey2ZH5vDbD0-nDeQ@mail.gmail.com>

On Tue, Aug 24, 2021 at 11:57:53PM +0800, DENG Qingfang wrote:
> Hi Sasha,
> 
> On Tue, Aug 24, 2021 at 11:29 PM Sasha Levin <sashal@kernel.org> wrote:
> > What's the reasoning behind:
> >
> > 1. Backporting this patch?
> 
> Standalone ports should have address learning disabled, according to
> the documentation:
> https://www.kernel.org/doc/html/v5.14-rc7/networking/dsa/dsa.html#bridge-layer
> dsa_switch_ops on 5.10 or earlier does not have .port_bridge_flags
> function so it has to be done differently.
> 
> I've identified an issue related to this.

What issue is that?  Where was it reported?

> > 2. A partial backport of this patch?
> 
> The other part does not actually fix anything.

Then why is it not ok to just take the whole thing?

When backporting not-identical-patches, something almost always goes
wrong, so we prefer to take the original commit when ever possible.

thanks,

greg k-h

  reply	other threads:[~2021-08-27 10:21 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24  5:55 [PATCH 4.19.y] net: dsa: mt7530: disable learning on standalone ports DENG Qingfang
2021-08-24  5:55 ` DENG Qingfang
2021-08-24  5:55 ` DENG Qingfang
2021-08-24 15:29 ` Sasha Levin
2021-08-24 15:29   ` Sasha Levin
2021-08-24 15:29   ` Sasha Levin
2021-08-24 15:57   ` DENG Qingfang
2021-08-24 15:57     ` DENG Qingfang
2021-08-24 15:57     ` DENG Qingfang
2021-08-27 10:19     ` Greg KH [this message]
2021-08-27 10:19       ` Greg KH
2021-08-27 10:19       ` Greg KH
2021-09-02  5:36       ` DENG Qingfang
2021-09-02  5:36         ` DENG Qingfang
2021-09-02  5:36         ` DENG Qingfang
2021-09-02  5:58         ` Greg KH
2021-09-02  5:58           ` Greg KH
2021-09-02  5:58           ` Greg KH
2021-09-03  9:14           ` DENG Qingfang
2021-09-03  9:14             ` DENG Qingfang
2021-09-03  9:14             ` DENG Qingfang
2021-09-07 15:18             ` Greg KH
2021-09-07 15:18               ` Greg KH
2021-09-07 15:18               ` Greg KH

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