drivers: net: cpsw: Fix broken loop condition in switch mode

0d961b3b52f566f823070ce2366511a7f64b928c (drivers: net: cpsw: fix buggy
loop condition) accidentally fixed a loop comparison in too many places
while fixing a real bug.

It was correct to fix the dual_emac mode section since there 'i' is used
as an index into priv->slaves which is a 0 based array.

However the other two changes (which are only used in switch mode)
are wrong since there 'i' is actually the ALE port number, and port 0
is the host port, while port 1 and up are the slave ports.

Putting the loop condition back in the switch mode section fixes it.

A comment has been added to point out the intent clearly to avoid future
confusion.  Also a comment is fixed that said the opposite of what was
actually happening.

Signed-off-by: Len Sorensen <lsorense@csclub.uwaterloo.ca>
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index d81b84b..fd4577d 100644 (file)
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -591,8 +591,8 @@ static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
                if (enable) {
                        unsigned long timeout = jiffies + HZ;
 
-                       /* Disable Learn for all ports */
-                       for (i = 0; i < priv->data.slaves; i++) {
+                       /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
+                       for (i = 0; i <= priv->data.slaves; i++) {
                                cpsw_ale_control_set(ale, i,
                                                     ALE_PORT_NOLEARN, 1);
                                cpsw_ale_control_set(ale, i,
@@ -616,11 +616,11 @@ static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
                        cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
                        dev_dbg(&ndev->dev, "promiscuity enabled\n");
                } else {
-                       /* Flood All Unicast Packets to Host port */
+                       /* Don't Flood All Unicast Packets to Host port */
                        cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
 
-                       /* Enable Learn for all ports */
-                       for (i = 0; i < priv->data.slaves; i++) {
+                       /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
+                       for (i = 0; i <= priv->data.slaves; i++) {
                                cpsw_ale_control_set(ale, i,
                                                     ALE_PORT_NOLEARN, 0);
                                cpsw_ale_control_set(ale, i,