netdev - [PATCH net-next 8/8] dsa: mv88e6131: Don't special case a single device

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Message-Id: <1460591998-20598-9-git-send-email-andrew@lunn.ch>
Date:	Thu, 14 Apr 2016 01:59:58 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	David Miller <davem@...emloft.net>
Cc:	Florian Fainelli <f.fainelli@...il.com>,
	netdev <netdev@...r.kernel.org>,
	Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
	Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next 8/8] dsa: mv88e6131: Don't special case a single device

When multiple switches are interconnected in a tree, a routing table
is used for directing packets out the correct port towards a remote
destination. This works equally well for a single switch, since the
routing table is empty. So don't special case for a single switch.
This makes the mv88e6131 behave like the other drivers.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/dsa/mv88e6131.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/net/dsa/mv88e6131.c b/drivers/net/dsa/mv88e6131.c
index 969f67c77835..c7ee11f73be6 100644
--- a/drivers/net/dsa/mv88e6131.c
+++ b/drivers/net/dsa/mv88e6131.c
@@ -74,18 +74,12 @@ static int mv88e6131_setup_global(struct dsa_switch *ds)
 	if (ret)
 		return ret;
 
-	/* Disable cascade port functionality unless this device
-	 * is used in a cascade configuration, and set the switch's
-	 * DSA device number.
+	/* Set the switch's DSA device number and enable the use of
+	 * the routing table.
 	 */
-	if (ds->dst->pd->nr_chips > 1)
-		ret = mv88e6xxx_reg_write(ps, REG_GLOBAL, GLOBAL_CONTROL_2,
-					  GLOBAL_CONTROL_2_MULTIPLE_CASCADE |
-					  (ds->index & 0x1f));
-	else
-		ret = mv88e6xxx_reg_write(ps, REG_GLOBAL, GLOBAL_CONTROL_2,
-					  GLOBAL_CONTROL_2_NO_CASCADE |
-					  (ds->index & 0x1f));
+	ret = mv88e6xxx_reg_write(ps, REG_GLOBAL, GLOBAL_CONTROL_2,
+				  GLOBAL_CONTROL_2_MULTIPLE_CASCADE |
+				  (ds->index & 0x1f));
 	if (ret)
 		return ret;
 
-- 
2.7.0