net: dsa: hellcreek: Fix incorrect setting of GCL

Currently the gate control list which is programmed into the hardware is
incorrect resulting in wrong traffic schedules. The problem is the loop
variables are incremented before they are referenced. Therefore, move the
increment to the end of the loop.

Fixes: 24dfc6eb39b2 ("net: dsa: hellcreek: Add TAPRIO offloading support")
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 5c54ae1be62c5ef0be68ff68ba2d318f2d09fed9..b57aea92684b87734d652ec997c9562525c85997 100644 (file)
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -1472,9 +1472,6 @@ static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port,
                u16 data;
                u8 gates;
 
-               cur++;
-               next++;
-
                if (i == schedule->num_entries)
                        gates = initial->gate_mask ^
                                cur->gate_mask;
@@ -1503,6 +1500,9 @@ static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port,
                        (initial->gate_mask <<
                         TR_GCLCMD_INIT_GATE_STATES_SHIFT);
                hellcreek_write(hellcreek, data, TR_GCLCMD);
+
+               cur++;
+               next++;
        }
 }