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[91.181.7.168]) by smtp.gmail.com with ESMTPSA id t17sm5180003edw.13.2021.08.16.11.09.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 11:09:40 -0700 (PDT) Date: Mon, 16 Aug 2021 20:09:38 +0200 From: Ben Hutchings To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 4/5] net: dsa: microchip: ksz8795: Fix VLAN untagged flag change on deletion Message-ID: <20210816180938.GH18930@cephalopod> References: <20210816174905.GD18930@cephalopod> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210816174905.GD18930@cephalopod> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org commit af01754f9e3c553a2ee63b4693c79a3956e230ab upstream. When a VLAN is deleted from a port, the flags in struct switchdev_obj_port_vlan are always 0. ksz8_port_vlan_del() copies the BRIDGE_VLAN_INFO_UNTAGGED flag to the port's Tag Removal flag, and therefore always clears it. In case there are multiple VLANs configured as untagged on this port - which seems useless, but is allowed - deleting one of them changes the remaining VLANs to be tagged. It's only ever necessary to change this flag when a VLAN is added to the port, so leave it unchanged in ksz8_port_vlan_del(). Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller [bwh: Backport to 5.10: adjust context] Signed-off-by: Ben Hutchings --- drivers/net/dsa/microchip/ksz8795.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c index b4b164d75520..8f2b54ae57f2 100644 --- a/drivers/net/dsa/microchip/ksz8795.c +++ b/drivers/net/dsa/microchip/ksz8795.c @@ -895,7 +895,6 @@ static void ksz8795_port_vlan_add(struct dsa_switch *ds, int port, static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan) { - bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; struct ksz_device *dev = ds->priv; u16 data, vid, pvid; u8 fid, member, valid; @@ -904,8 +903,6 @@ static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port, ksz_pread16(dev, port, REG_PORT_CTRL_VID, &pvid); pvid = pvid & 0xFFF; - ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged); - for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) { ksz8795_r_vlan_table(dev, vid, &data); ksz8795_from_vlan(data, &fid, &member, &valid); -- 2.20.1