[PATCH 5.9 297/757] net: dsa: rtl8366rb: Support all 4096 VLANs

From: Greg Kroah-Hartman
Date: Tue Oct 27 2020 - 12:26:42 EST


From: Linus Walleij <linus.walleij@xxxxxxxxxx>

[ Upstream commit a7920efdd86d8a0d74402dbc80ead03b023294ba ]

There is an off-by-one error in rtl8366rb_is_vlan_valid()
making VLANs 0..4094 valid while it should be 1..4095.
Fix it.

Fixes: d8652956cf37 ("net: dsa: realtek-smi: Add Realtek SMI driver")
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/dsa/rtl8366rb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/rtl8366rb.c b/drivers/net/dsa/rtl8366rb.c
index 48f1ff7467999..5cfffa7559c7c 100644
--- a/drivers/net/dsa/rtl8366rb.c
+++ b/drivers/net/dsa/rtl8366rb.c
@@ -1255,7 +1255,7 @@ static bool rtl8366rb_is_vlan_valid(struct realtek_smi *smi, unsigned int vlan)
if (smi->vlan4k_enabled)
max = RTL8366RB_NUM_VIDS - 1;

- if (vlan == 0 || vlan >= max)
+ if (vlan == 0 || vlan > max)
return false;

return true;
--
2.25.1