linux-kernel - [PATCH net-next 3/9] net: dsa: fix dsa_is_normal

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Date:   Thu, 26 Oct 2017 11:22:53 -0400
From:   Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next 3/9] net: dsa: fix dsa_is_normal_port helper

In order to know if a port is of type user, dsa_is_normal_port checks
that the given port is not of type DSA nor CPU. This is not enough
because a port can be unused.

Without the previous fix, this caused the unused mv88e6xxx ports to be
configured in normal mode.

The ds->enabled_port_mask reports the user ports, so check this instead.

Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
 include/net/dsa.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 6b1bc1c8f7e2..4ad432ad2d40 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -273,7 +273,7 @@ static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
 
 static inline bool dsa_is_normal_port(struct dsa_switch *ds, int p)
 {
-	return !dsa_is_cpu_port(ds, p) && !dsa_is_dsa_port(ds, p);
+	return !!(ds->enabled_port_mask & BIT(p));
 }
 
 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
-- 
2.14.3