net: dsa: microchip: ksz8795: Fix VLAN untagged flag change on deletion
stable inclusion from stable-5.10.60 commit 1e78179d75fb796b015f4d71d01d8e8725fde466 bugzilla: 177018 https://gitee.com/openeuler/kernel/issues/I4EAUG Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1e78179d75fb796b015f4d71d01d8e8725fde466 -------------------------------- commit af01754f 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: e66f840c ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: NBen Hutchings <ben.hutchings@mind.be> Signed-off-by: NDavid S. Miller <davem@davemloft.net> [bwh: Backport to 5.10: adjust context] Signed-off-by: NBen Hutchings <ben.hutchings@mind.be> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NChen Jun <chenjun102@huawei.com> Acked-by: NWeilong Chen <chenweilong@huawei.com> Signed-off-by: NChen Jun <chenjun102@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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