diff mbox series

[net-next,1/3,v1] net: dsa: rtl8366: Fix VLAN semantics

Message ID 20200708204456.1365855-2-linus.walleij@linaro.org
State Superseded
Headers show
Series Rectify RTL8366 default VLAN Behaviour | expand

Commit Message

Linus Walleij July 8, 2020, 8:44 p.m. UTC
The RTL8366 would not handle adding new members (ports) to
a VLAN: the code assumed that ->port_vlan_add() was only
called once for a single port. When intializing the
switch with .configure_vlan_while_not_filtering set to
true, the function is called numerous times for adding
all ports to VLAN1, which was something the code could
not handle.

Alter rtl8366_set_vlan() to just |= new members and
untagged flags to 4k and MC VLAN table entries alike.
This makes it possible to just add new ports to a
VLAN.

Put in some helpful debug code that can be used to find
any further bugs here.

Cc: DENG Qingfang <dqfext@gmail.com>
Cc: Mauri Sandberg <sandberg@mailfence.com>
Fixes: d8652956cf37 ("net: dsa: realtek-smi: Add Realtek SMI driver")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

---
 drivers/net/dsa/rtl8366.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

-- 
2.26.2

Comments

Florian Fainelli July 9, 2020, 2:13 a.m. UTC | #1
On 7/8/2020 1:44 PM, Linus Walleij wrote:
> The RTL8366 would not handle adding new members (ports) to

> a VLAN: the code assumed that ->port_vlan_add() was only

> called once for a single port. When intializing the

> switch with .configure_vlan_while_not_filtering set to

> true, the function is called numerous times for adding

> all ports to VLAN1, which was something the code could

> not handle.

> 

> Alter rtl8366_set_vlan() to just |= new members and

> untagged flags to 4k and MC VLAN table entries alike.

> This makes it possible to just add new ports to a

> VLAN.

> 

> Put in some helpful debug code that can be used to find

> any further bugs here.

> 

> Cc: DENG Qingfang <dqfext@gmail.com>

> Cc: Mauri Sandberg <sandberg@mailfence.com>

> Fixes: d8652956cf37 ("net: dsa: realtek-smi: Add Realtek SMI driver")

> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>


Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

-- 
Florian
diff mbox series

Patch

diff --git a/drivers/net/dsa/rtl8366.c b/drivers/net/dsa/rtl8366.c
index 993cf3ac59d9..2997abeecc4a 100644
--- a/drivers/net/dsa/rtl8366.c
+++ b/drivers/net/dsa/rtl8366.c
@@ -43,18 +43,26 @@  int rtl8366_set_vlan(struct realtek_smi *smi, int vid, u32 member,
 	int ret;
 	int i;
 
+	dev_dbg(smi->dev,
+		"setting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n",
+		vid, member, untag);
+
 	/* Update the 4K table */
 	ret = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
 	if (ret)
 		return ret;
 
-	vlan4k.member = member;
-	vlan4k.untag = untag;
+	vlan4k.member |= member;
+	vlan4k.untag |= untag;
 	vlan4k.fid = fid;
 	ret = smi->ops->set_vlan_4k(smi, &vlan4k);
 	if (ret)
 		return ret;
 
+	dev_dbg(smi->dev,
+		"resulting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n",
+		vid, vlan4k.member, vlan4k.untag);
+
 	/* Try to find an existing MC entry for this VID */
 	for (i = 0; i < smi->num_vlan_mc; i++) {
 		struct rtl8366_vlan_mc vlanmc;
@@ -65,11 +73,16 @@  int rtl8366_set_vlan(struct realtek_smi *smi, int vid, u32 member,
 
 		if (vid == vlanmc.vid) {
 			/* update the MC entry */
-			vlanmc.member = member;
-			vlanmc.untag = untag;
+			vlanmc.member |= member;
+			vlanmc.untag |= untag;
 			vlanmc.fid = fid;
 
 			ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
+
+			dev_dbg(smi->dev,
+				"resulting VLAN%d MC members: 0x%02x, untagged: 0x%02x\n",
+				vid, vlanmc.member, vlanmc.untag);
+
 			break;
 		}
 	}