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Miller" , Jakub Kicinski , Matthias Brugger , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, Eric Woudstra , =?utf-8?B?UmVuw6k=?= van Dorst , Frank Wunderlich Subject: Re: [RFC net-next v2 3/4] net: dsa: mt7530: set STP state also on filter ID 1 Message-ID: <20210802210006.fhmb5s6dsnziyk7d@skbuf> References: <20210731191023.1329446-1-dqfext@gmail.com> <20210731191023.1329446-4-dqfext@gmail.com> <20210802134336.gv66le6u2z52kfkh@skbuf> <20210802153129.1817825-1-dqfext@gmail.com> <20210802154226.qggqzkxe6urkx3yf@skbuf> <20210802155810.1818085-1-dqfext@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210802155810.1818085-1-dqfext@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 02, 2021 at 11:58:10PM +0800, DENG Qingfang wrote: > On Mon, Aug 02, 2021 at 06:42:26PM +0300, Vladimir Oltean wrote: > > On Mon, Aug 02, 2021 at 11:31:29PM +0800, DENG Qingfang wrote: > > > The current code only sets FID 0's STP state. This patch sets both 0's and > > > 1's states. > > > > > > The *5 part is binary magic. [1:0] is FID 0's state, [3:2] is FID 1's state > > > and so on. Since 5 == 4'b0101, the value in [1:0] is copied to [3:2] after > > > the multiplication. > > > > > > Perhaps I should only change FID 1's state. > > > > Keep the patches dumb for us mortals please. > > If you only change FID 1's state, I am concerned that the driver no > > longer initializes FID 0's port state, and might leave that to the > > default set by other pre-kernel initialization stage (bootloader?). > > So even if you might assume that standalone ports are FORWARDING, they > > might not be. > > The default value is forwarding, and the switch is reset by the driver > so any pre-kernel initialization stage is no more. So then change the port STP state only for FID 1 and resend. Any other reason why this patch series is marked RFC? It looked okay to me otherwise.