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SubjectRe: [PATCH v2] net: ethernet: ti: ale: ensure vlan/mdb deleted when no members
On Fri, Nov 29, 2019 at 07:58:09PM +0200, Grygorii Strashko wrote:
> The recently updated ALE APIs cpsw_ale_del_mcast() and
> cpsw_ale_del_vlan_modify() have an issue and will not delete ALE entry even
> if VLAN/mcast group has no more members. Hence fix it here and delete ALE
> entry if !port_mask.
>
> The issue affected only new cpsw switchdev driver.
>
> Fixes: e85c14370783 ("net: ethernet: ti: ale: modify vlan/mdb api for switchdev")
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
> ---
> drivers/net/ethernet/ti/cpsw_ale.c | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
> index 929f3d3354e3..ecdbde539eb7 100644
> --- a/drivers/net/ethernet/ti/cpsw_ale.c
> +++ b/drivers/net/ethernet/ti/cpsw_ale.c
> @@ -384,7 +384,7 @@ int cpsw_ale_del_mcast(struct cpsw_ale *ale, const u8 *addr, int port_mask,
> int flags, u16 vid)
> {
> u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
> - int mcast_members;
> + int mcast_members = 0;
> int idx;
>
> idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
> @@ -397,11 +397,13 @@ int cpsw_ale_del_mcast(struct cpsw_ale *ale, const u8 *addr, int port_mask,
> mcast_members = cpsw_ale_get_port_mask(ale_entry,
> ale->port_mask_bits);
> mcast_members &= ~port_mask;
> + }
> +
> + if (mcast_members)
> cpsw_ale_set_port_mask(ale_entry, mcast_members,
> ale->port_mask_bits);
> - } else {
> + else
> cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
> - }
>
> cpsw_ale_write(ale, idx, ale_entry);
> return 0;
> @@ -478,6 +480,10 @@ static void cpsw_ale_del_vlan_modify(struct cpsw_ale *ale, u32 *ale_entry,
> members = cpsw_ale_get_vlan_member_list(ale_entry,
> ale->vlan_field_bits);
> members &= ~port_mask;
> + if (!members) {
> + cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
> + return;
> + }
>
> untag = cpsw_ale_get_vlan_untag_force(ale_entry,
> ale->vlan_field_bits);
> --
> 2.17.1
>

Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

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