kernel: 5.10: backport qca8k cpu_port_index fix in parse_port_config

Add cpu_port_index fix to apply settings to correct CPU port.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Matthew Hagan <mnhagan88@gmail.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/798-v5.16-net-dsa-qca8k-fix-delay-applied-to-wrong-cpu-in-parse-p.patch b/target/linux/generic/backport-5.10/798-v5.16-net-dsa-qca8k-fix-delay-applied-to-wrong-cpu-in-parse-p.patch
new file mode 100644
index 0000000000..a510cfdc18
--- /dev/null
+++ b/target/linux/generic/backport-5.10/798-v5.16-net-dsa-qca8k-fix-delay-applied-to-wrong-cpu-in-parse-p.patch
@@ -0,0 +1,28 @@
+From 06dd34a628ae5b6a839b757e746de165d6789ca8 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Sun, 17 Oct 2021 16:56:46 +0200
+Subject: net: dsa: qca8k: fix delay applied to wrong cpu in parse_port_config
+
+Fix delay settings applied to wrong cpu in parse_port_config. The delay
+values is set to the wrong index as the cpu_port_index is incremented
+too early. Start the cpu_port_index to -1 so the correct value is
+applied to address also the case with invalid phy mode and not available
+port.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/qca8k.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/dsa/qca8k.c
++++ b/drivers/net/dsa/qca8k.c
+@@ -976,7 +976,7 @@ qca8k_setup_of_pws_reg(struct qca8k_priv
+ static int
+ qca8k_parse_port_config(struct qca8k_priv *priv)
+ {
+-	int port, cpu_port_index = 0, ret;
++	int port, cpu_port_index = -1, ret;
+ 	struct device_node *port_dn;
+ 	phy_interface_t mode;
+ 	struct dsa_port *dp;