net: airoha: add RCU lock around dev_fill_forward_path

Since 0417adf367a0 ("ppp: fix race conditions in ppp_fill_forward_path")
dev_fill_forward_path() should be called with RCU read lock held. This
fix was applied to net, while the Airoha flowtable commit was applied to
net-next, so it hadn't been an issue until net was merged into net-next.

Fixes: a8bdd935d1dd ("net: airoha: Add wlan flowtable TX offload")
Signed-off-by: Qingfang Deng <dqfext@gmail.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260320094315.525126-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c
index 42dbe8f93231e849f37f501882598cc264aefb95..5724f8f2defd51fd40a81a40491ce9db3119451e 100644 (file)
--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -227,7 +227,9 @@ static int airoha_ppe_get_wdma_info(struct net_device *dev, const u8 *addr,
        if (!dev)
                return -ENODEV;
 
+       rcu_read_lock();
        err = dev_fill_forward_path(dev, addr, &stack);
+       rcu_read_unlock();
        if (err)
                return err;