[openwrt/openwrt] realtek: dsa: rtl83xx: fix init section mismatch

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-25.12:
https://git.openwrt.org/0837be599dee9c13b83130b5effc2bb6faed4fa1

commit 0837be599dee9c13b83130b5effc2bb6faed4fa1
Author: Markus Stockhausen <markus.stockhausen at gmx.de>
AuthorDate: Sun Jan 25 09:27:56 2026 +0100

    realtek: dsa: rtl83xx: fix init section mismatch
    
    Compilation currently spits this message:
    
    WARNING: modpost: vmlinux: section mismatch in reference:
    rtl83xx_sw_probe+0x6a4 (section: .text.rtl83xx_sw_probe)
    -> rtl83xx_setup_qos (section: .init.text)
    
    That means that we have a "normal" function caller (can be
    called during the whole uptime) and a "initialization" function
    callee (only available during init.
    
    Fix this and directly fix the unwanted family checks.
    
    Fixes: 012e0091 ("realtek: dsa: avoid use-after-free")
    Signed-off-by: Markus Stockhausen <markus.stockhausen at gmx.de>
    Link: https://github.com/openwrt/openwrt/pull/21690
    
    (cherry picked from commit adbb9a64235e1575bcd47c75d9cdc628b96a15e0)
    Link: https://github.com/openwrt/openwrt/pull/21900
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 .../files-6.12/drivers/net/dsa/rtl83xx/common.c    |  3 ++-
 .../files-6.12/drivers/net/dsa/rtl83xx/qos.c       | 28 +++++++---------------
 .../files-6.12/drivers/net/dsa/rtl83xx/rtl838x.c   |  1 +
 .../files-6.12/drivers/net/dsa/rtl83xx/rtl839x.c   |  1 +
 .../files-6.12/drivers/net/dsa/rtl83xx/rtl83xx.h   |  3 ++-
 5 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/common.c b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/common.c
index 1f0578ebba..99c7cf2c25 100644
--- a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/common.c
+++ b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/common.c
@@ -1586,7 +1586,8 @@ static int rtl83xx_sw_probe(struct platform_device *pdev)
 
 	rtl83xx_get_l2aging(priv);
 
-	rtl83xx_setup_qos(priv);
+	if (priv->r->qos_init)
+		priv->r->qos_init(priv);
 
 	if (priv->r->l3_setup)
 		priv->r->l3_setup(priv);
diff --git a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/qos.c b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/qos.c
index 1b5b714290..ff515bea10 100644
--- a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/qos.c
+++ b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/qos.c
@@ -547,24 +547,14 @@ static void rtl839x_config_qos(void)
 	}
 }
 
-void __init rtl83xx_setup_qos(struct rtl838x_switch_priv *priv)
+void rtldsa_838x_qos_init(struct rtl838x_switch_priv *priv)
 {
-	switch_priv = priv;
-
-	pr_info("In %s\n", __func__);
-
-	switch (priv->family_id) {
-	case RTL8380_FAMILY_ID:
-		rtl838x_config_qos();
-		rtl838x_rate_control_init(priv);
-		break;
-	case RTL8390_FAMILY_ID:
-		rtl839x_config_qos();
-		rtl839x_rate_control_init(priv);
-		break;
-	default:
-		if (priv->r->qos_init)
-			priv->r->qos_init(priv);
-		break;
-	}
+	rtl838x_config_qos();
+	rtl838x_rate_control_init(priv);
+}
+
+void rtldsa_839x_qos_init(struct rtl838x_switch_priv *priv)
+{
+	rtl839x_config_qos();
+	rtl839x_rate_control_init(priv);
 }
diff --git a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl838x.c b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl838x.c
index 39e15ba3e0..728190d667 100644
--- a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl838x.c
+++ b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl838x.c
@@ -1744,6 +1744,7 @@ const struct rtl838x_reg rtl838x_reg = {
 	.l3_setup = rtl838x_l3_setup,
 	.set_distribution_algorithm = rtl838x_set_distribution_algorithm,
 	.set_receive_management_action = rtl838x_set_receive_management_action,
+	.qos_init = rtldsa_838x_qos_init,
 };
 
 irqreturn_t rtl838x_switch_irq(int irq, void *dev_id)
diff --git a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl839x.c b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl839x.c
index c63f5cddfc..711bd9d84f 100644
--- a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl839x.c
+++ b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl839x.c
@@ -1713,4 +1713,5 @@ const struct rtl838x_reg rtl839x_reg = {
 	.l3_setup = rtl839x_l3_setup,
 	.set_distribution_algorithm = rtl839x_set_distribution_algorithm,
 	.set_receive_management_action = rtl839x_set_receive_management_action,
+	.qos_init = rtldsa_839x_qos_init,
 };
diff --git a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl83xx.h b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl83xx.h
index a3cb62ceb7..ddee0a0d8a 100644
--- a/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl83xx.h
+++ b/target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl83xx.h
@@ -131,7 +131,8 @@ inline u16 rtl_table_data(struct table_reg *r, int i);
 inline u32 rtl_table_data_r(struct table_reg *r, int i);
 inline void rtl_table_data_w(struct table_reg *r, u32 v, int i);
 
-void __init rtl83xx_setup_qos(struct rtl838x_switch_priv *priv);
+void rtldsa_838x_qos_init(struct rtl838x_switch_priv *priv);
+void rtldsa_839x_qos_init(struct rtl838x_switch_priv *priv);
 
 void rtl83xx_fast_age(struct dsa_switch *ds, int port);
 int rtl83xx_packet_cntr_alloc(struct rtl838x_switch_priv *priv);