linux-kernel - [PATCH 5.14 366/849] net: dsa: rtl8366: Fix a bug in deleting VLANs

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Date:   Mon, 15 Nov 2021 17:57:29 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mauri Sandberg <sandberg@...lfence.com>,
        DENG Qingfang <dqfext@...il.com>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Vladimir Oltean <olteanv@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 366/849] net: dsa: rtl8366: Fix a bug in deleting VLANs

From: Linus Walleij <linus.walleij@...aro.org>

[ Upstream commit d8251b9db34a2cbc5619b610e7e8aad1d165c531 ]

We were checking that the MC (member config) was != 0
for some reason, all we need to check is that the config
has no ports, i.e. no members. Then it can be recycled.
This must be some misunderstanding.

Fixes: 4ddcaf1ebb5e ("net: dsa: rtl8366: Properly clear member config")
Cc: Mauri Sandberg <sandberg@...lfence.com>
Cc: DENG Qingfang <dqfext@...il.com>
Reviewed-by: Alvin Šipraga <alsi@...g-olufsen.dk>
Reviewed-by: Vladimir Oltean <olteanv@...il.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/dsa/rtl8366.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/rtl8366.c b/drivers/net/dsa/rtl8366.c
index 75897a3690969..ffbe5b6b2655b 100644
--- a/drivers/net/dsa/rtl8366.c
+++ b/drivers/net/dsa/rtl8366.c
@@ -457,7 +457,7 @@ int rtl8366_vlan_del(struct dsa_switch *ds, int port,
 			 * anymore then clear the whole member
 			 * config so it can be reused.
 			 */
-			if (!vlanmc.member && vlanmc.untag) {
+			if (!vlanmc.member) {
 				vlanmc.vid = 0;
 				vlanmc.priority = 0;
 				vlanmc.fid = 0;
-- 
2.33.0