diff mbox series

[5.13,057/113] net: dsa: hellcreek: Fix incorrect setting of GCL

Message ID 20210901122303.873808465@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Sept. 1, 2021, 12:28 p.m. UTC 
From: Kurt Kanzenbach <kurt@linutronix.de>

[ Upstream commit a7db5ed8632c88c029254d5d74765d52614af3fd ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/dsa/hirschmann/hellcreek.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 50109218baad..3aab01c25f9a 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -1473,9 +1473,6 @@  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;
@@ -1504,6 +1501,9 @@  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++;
 	}
 }