kernel: replace threaded NAPI implementation in 5.10 with upstream backport

This uses a kthread per NAPI instance instead of the workqueue approach

Signed-off-by: Felix Fietkau <nbd@nbd.name>

11 files changed, 20 insertions, 395 deletions

diff --git a/target/linux/generic/pending-5.10/640-02-net-resolve-forwarding-path-from-virtual-netdevice-a.patch b/target/linux/generic/pending-5.10/640-02-net-resolve-forwarding-path-from-virtual-netdevice-a.patch
index 603dddfc36..224831d593 100644
--- a/target/linux/generic/pending-5.10/640-02-net-resolve-forwarding-path-from-virtual-netdevice-a.patch
+++ b/target/linux/generic/pending-5.10/640-02-net-resolve-forwarding-path-from-virtual-netdevice-a.patch
@@ -58,7 +58,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -833,6 +833,27 @@ typedef u16 (*select_queue_fallback_t)(s
+@@ -827,6 +827,27 @@ typedef u16 (*select_queue_fallback_t)(s
  				       struct sk_buff *skb,
  				       struct net_device *sb_dev);
  
@@ -86,7 +86,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  enum tc_setup_type {
  	TC_SETUP_QDISC_MQPRIO,
  	TC_SETUP_CLSU32,
-@@ -1279,6 +1300,8 @@ struct netdev_net_notifier {
+@@ -1273,6 +1294,8 @@ struct netdev_net_notifier {
   * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev);
   *	If a device is paired with a peer device, return the peer instance.
   *	The caller must be under RCU read context.
@@ -95,7 +95,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
   */
  struct net_device_ops {
  	int			(*ndo_init)(struct net_device *dev);
-@@ -1487,6 +1510,8 @@ struct net_device_ops {
+@@ -1481,6 +1504,8 @@ struct net_device_ops {
  	int			(*ndo_tunnel_ctl)(struct net_device *dev,
  						  struct ip_tunnel_parm *p, int cmd);
  	struct net_device *	(*ndo_get_peer_dev)(struct net_device *dev);
@@ -104,7 +104,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  };
  
  /**
-@@ -2798,6 +2823,8 @@ void dev_remove_offload(struct packet_of
+@@ -2795,6 +2820,8 @@ void dev_remove_offload(struct packet_of
  
  int dev_get_iflink(const struct net_device *dev);
  int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
@@ -115,7 +115,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  struct net_device *dev_get_by_name(struct net *net, const char *name);
 --- a/net/core/dev.c
 +++ b/net/core/dev.c
-@@ -846,6 +846,52 @@ int dev_fill_metadata_dst(struct net_dev
+@@ -847,6 +847,52 @@ int dev_fill_metadata_dst(struct net_dev
  }
  EXPORT_SYMBOL_GPL(dev_fill_metadata_dst);
  
diff --git a/target/linux/generic/pending-5.10/640-03-net-8021q-resolve-forwarding-path-for-vlan-devices.patch b/target/linux/generic/pending-5.10/640-03-net-8021q-resolve-forwarding-path-for-vlan-devices.patch
index 26fb64509c..69e025be26 100644
--- a/target/linux/generic/pending-5.10/640-03-net-8021q-resolve-forwarding-path-for-vlan-devices.patch
+++ b/target/linux/generic/pending-5.10/640-03-net-8021q-resolve-forwarding-path-for-vlan-devices.patch
@@ -28,7 +28,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -835,11 +835,18 @@ typedef u16 (*select_queue_fallback_t)(s
+@@ -829,11 +829,18 @@ typedef u16 (*select_queue_fallback_t)(s
  
  enum net_device_path_type {
  	DEV_PATH_ETHERNET = 0,
diff --git a/target/linux/generic/pending-5.10/640-04-bridge-resolve-forwarding-path-for-bridge-devices.patch b/target/linux/generic/pending-5.10/640-04-bridge-resolve-forwarding-path-for-bridge-devices.patch
index d9093b3da4..cfb817f20f 100644
--- a/target/linux/generic/pending-5.10/640-04-bridge-resolve-forwarding-path-for-bridge-devices.patch
+++ b/target/linux/generic/pending-5.10/640-04-bridge-resolve-forwarding-path-for-bridge-devices.patch
@@ -9,7 +9,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -836,6 +836,7 @@ typedef u16 (*select_queue_fallback_t)(s
+@@ -830,6 +830,7 @@ typedef u16 (*select_queue_fallback_t)(s
  enum net_device_path_type {
  	DEV_PATH_ETHERNET = 0,
  	DEV_PATH_VLAN,
diff --git a/target/linux/generic/pending-5.10/640-09-net-bridge-resolve-VLAN-tag-actions-in-forwarding-pa.patch b/target/linux/generic/pending-5.10/640-09-net-bridge-resolve-VLAN-tag-actions-in-forwarding-pa.patch
index 9bd1f6b4c6..8f8d58b299 100644
--- a/target/linux/generic/pending-5.10/640-09-net-bridge-resolve-VLAN-tag-actions-in-forwarding-pa.patch
+++ b/target/linux/generic/pending-5.10/640-09-net-bridge-resolve-VLAN-tag-actions-in-forwarding-pa.patch
@@ -15,7 +15,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -847,10 +847,20 @@ struct net_device_path {
+@@ -841,10 +841,20 @@ struct net_device_path {
  			u16		id;
  			__be16		proto;
  		} encap;
@@ -36,7 +36,7 @@ Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  
  struct net_device_path_stack {
  	int			num_paths;
-@@ -860,6 +870,12 @@ struct net_device_path_stack {
+@@ -854,6 +864,12 @@ struct net_device_path_stack {
  struct net_device_path_ctx {
  	const struct net_device *dev;
  	const u8		*daddr;
diff --git a/target/linux/generic/pending-5.10/640-11-net-ppp-resolve-forwarding-path-for-bridge-pppoe-dev.patch b/target/linux/generic/pending-5.10/640-11-net-ppp-resolve-forwarding-path-for-bridge-pppoe-dev.patch
index 34d918206f..88c89b27a0 100644
--- a/target/linux/generic/pending-5.10/640-11-net-ppp-resolve-forwarding-path-for-bridge-pppoe-dev.patch
+++ b/target/linux/generic/pending-5.10/640-11-net-ppp-resolve-forwarding-path-for-bridge-pppoe-dev.patch
@@ -78,7 +78,7 @@ Pass on the PPPoE session ID and the real device.
  static int pppoe_recvmsg(struct socket *sock, struct msghdr *m,
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -837,6 +837,7 @@ enum net_device_path_type {
+@@ -831,6 +831,7 @@ enum net_device_path_type {
  	DEV_PATH_ETHERNET = 0,
  	DEV_PATH_VLAN,
  	DEV_PATH_BRIDGE,
diff --git a/target/linux/generic/pending-5.10/640-12-net-dsa-resolve-forwarding-path-for-dsa-slave-ports.patch b/target/linux/generic/pending-5.10/640-12-net-dsa-resolve-forwarding-path-for-dsa-slave-ports.patch
index 3e7a9eaef9..c8f0a32dd9 100644
--- a/target/linux/generic/pending-5.10/640-12-net-dsa-resolve-forwarding-path-for-dsa-slave-ports.patch
+++ b/target/linux/generic/pending-5.10/640-12-net-dsa-resolve-forwarding-path-for-dsa-slave-ports.patch
@@ -7,7 +7,7 @@ Add .ndo_fill_forward_path for dsa slave port devices
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -838,6 +838,7 @@ enum net_device_path_type {
+@@ -832,6 +832,7 @@ enum net_device_path_type {
  	DEV_PATH_VLAN,
  	DEV_PATH_BRIDGE,
  	DEV_PATH_PPPOE,
@@ -15,7 +15,7 @@ Add .ndo_fill_forward_path for dsa slave port devices
  };
  
  struct net_device_path {
-@@ -857,6 +858,10 @@ struct net_device_path {
+@@ -851,6 +852,10 @@ struct net_device_path {
  			u16		vlan_id;
  			__be16		vlan_proto;
  		} bridge;
diff --git a/target/linux/generic/pending-5.10/640-13-netfilter-flowtable-add-pppoe-support.patch b/target/linux/generic/pending-5.10/640-13-netfilter-flowtable-add-pppoe-support.patch
index 6a14514565..524f466bf9 100644
--- a/target/linux/generic/pending-5.10/640-13-netfilter-flowtable-add-pppoe-support.patch
+++ b/target/linux/generic/pending-5.10/640-13-netfilter-flowtable-add-pppoe-support.patch
@@ -27,7 +27,7 @@ Subject: [PATCH] netfilter: flowtable: add pppoe support
  
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -848,6 +848,7 @@ struct net_device_path {
+@@ -842,6 +842,7 @@ struct net_device_path {
  		struct {
  			u16		id;
  			__be16		proto;
diff --git a/target/linux/generic/pending-5.10/640-18-netfilter-nf_flow_table-fix-untagging-with-hardware-.patch b/target/linux/generic/pending-5.10/640-18-netfilter-nf_flow_table-fix-untagging-with-hardware-.patch
index 33600a862e..18f43196eb 100644
--- a/target/linux/generic/pending-5.10/640-18-netfilter-nf_flow_table-fix-untagging-with-hardware-.patch
+++ b/target/linux/generic/pending-5.10/640-18-netfilter-nf_flow_table-fix-untagging-with-hardware-.patch
@@ -11,7 +11,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -855,6 +855,7 @@ struct net_device_path {
+@@ -849,6 +849,7 @@ struct net_device_path {
  				DEV_PATH_BR_VLAN_KEEP,
  				DEV_PATH_BR_VLAN_TAG,
  				DEV_PATH_BR_VLAN_UNTAG,
diff --git a/target/linux/generic/pending-5.10/680-NET-skip-GRO-for-foreign-MAC-addresses.patch b/target/linux/generic/pending-5.10/680-NET-skip-GRO-for-foreign-MAC-addresses.patch
index 0422221468..3e2aa368d2 100644
--- a/target/linux/generic/pending-5.10/680-NET-skip-GRO-for-foreign-MAC-addresses.patch
+++ b/target/linux/generic/pending-5.10/680-NET-skip-GRO-for-foreign-MAC-addresses.patch
@@ -11,7 +11,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 
 --- a/include/linux/netdevice.h
 +++ b/include/linux/netdevice.h
-@@ -2033,6 +2033,8 @@ struct net_device {
+@@ -2029,6 +2029,8 @@ struct net_device {
  	struct netdev_hw_addr_list	mc;
  	struct netdev_hw_addr_list	dev_addrs;
  
@@ -32,7 +32,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	__u16			tc_index;	/* traffic control index */
 --- a/net/core/dev.c
 +++ b/net/core/dev.c
-@@ -5965,6 +5965,9 @@ static enum gro_result dev_gro_receive(s
+@@ -6005,6 +6005,9 @@ static enum gro_result dev_gro_receive(s
  	int same_flow;
  	int grow;
  
@@ -42,7 +42,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	if (netif_elide_gro(skb->dev))
  		goto normal;
  
-@@ -7793,6 +7796,48 @@ static void __netdev_adjacent_dev_unlink
+@@ -7973,6 +7976,48 @@ static void __netdev_adjacent_dev_unlink
  					   &upper_dev->adj_list.lower);
  }
  
@@ -91,7 +91,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  static int __netdev_upper_dev_link(struct net_device *dev,
  				   struct net_device *upper_dev, bool master,
  				   void *upper_priv, void *upper_info,
-@@ -7844,6 +7889,7 @@ static int __netdev_upper_dev_link(struc
+@@ -8024,6 +8069,7 @@ static int __netdev_upper_dev_link(struc
  	if (ret)
  		return ret;
  
@@ -99,7 +99,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	ret = call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
  					    &changeupper_info.info);
  	ret = notifier_to_errno(ret);
-@@ -7940,6 +7986,7 @@ static void __netdev_upper_dev_unlink(st
+@@ -8120,6 +8166,7 @@ static void __netdev_upper_dev_unlink(st
  
  	__netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
  
@@ -107,7 +107,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	call_netdevice_notifiers_info(NETDEV_CHANGEUPPER,
  				      &changeupper_info.info);
  
-@@ -8726,6 +8773,7 @@ int dev_set_mac_address(struct net_devic
+@@ -8906,6 +8953,7 @@ int dev_set_mac_address(struct net_devic
  	if (err)
  		return err;
  	dev->addr_assign_type = NET_ADDR_SET;
diff --git a/target/linux/generic/pending-5.10/690-net-add-support-for-threaded-NAPI-polling.patch b/target/linux/generic/pending-5.10/690-net-add-support-for-threaded-NAPI-polling.patch
deleted file mode 100644
index 9b1bd6e976..0000000000
--- a/target/linux/generic/pending-5.10/690-net-add-support-for-threaded-NAPI-polling.patch
+++ /dev/null
@@ -1,301 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sun, 26 Jul 2020 14:03:21 +0200
-Subject: [PATCH] net: add support for threaded NAPI polling
-
-For some drivers (especially 802.11 drivers), doing a lot of work in the NAPI
-poll function does not perform well. Since NAPI poll is bound to the CPU it
-was scheduled from, we can easily end up with a few very busy CPUs spending
-most of their time in softirq/ksoftirqd and some idle ones.
-
-Introduce threaded NAPI for such drivers based on a workqueue. The API is the
-same except for using netif_threaded_napi_add instead of netif_napi_add.
-
-In my tests with mt76 on MT7621 using threaded NAPI + a thread for tx scheduling
-improves LAN->WLAN bridging throughput by 10-50%. Throughput without threaded
-NAPI is wildly inconsistent, depending on the CPU that runs the tx scheduling
-thread.
-
-With threaded NAPI, throughput seems stable and consistent (and higher than
-the best results I got without it).
-
-Based on a patch by Hillf Danton
-
-Cc: Hillf Danton <hdanton@sina.com>
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/include/linux/netdevice.h
-+++ b/include/linux/netdevice.h
-@@ -347,6 +347,7 @@ struct napi_struct {
- 	struct list_head	dev_list;
- 	struct hlist_node	napi_hash_node;
- 	unsigned int		napi_id;
-+	struct work_struct	work;
- };
- 
- enum {
-@@ -357,6 +358,7 @@ enum {
- 	NAPI_STATE_LISTED,	/* NAPI added to system lists */
- 	NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
- 	NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
-+	NAPI_STATE_THREADED,	/* Use threaded NAPI */
- };
- 
- enum {
-@@ -367,6 +369,7 @@ enum {
- 	NAPIF_STATE_LISTED	 = BIT(NAPI_STATE_LISTED),
- 	NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
- 	NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
-+	NAPIF_STATE_THREADED	 = BIT(NAPI_STATE_THREADED),
- };
- 
- enum gro_result {
-@@ -2211,6 +2214,7 @@ struct net_device {
- 	struct lock_class_key	*qdisc_running_key;
- 	bool			proto_down;
- 	unsigned		wol_enabled:1;
-+	unsigned		threaded:1;
- 
- 	struct list_head	net_notifier_list;
- 
-@@ -2413,6 +2417,26 @@ void netif_napi_add(struct net_device *d
- 		    int (*poll)(struct napi_struct *, int), int weight);
- 
- /**
-+ *	netif_threaded_napi_add - initialize a NAPI context
-+ *	@dev:  network device
-+ *	@napi: NAPI context
-+ *	@poll: polling function
-+ *	@weight: default weight
-+ *
-+ * This variant of netif_napi_add() should be used from drivers using NAPI
-+ * with CPU intensive poll functions.
-+ * This will schedule polling from a high priority workqueue
-+ */
-+static inline void netif_threaded_napi_add(struct net_device *dev,
-+					   struct napi_struct *napi,
-+					   int (*poll)(struct napi_struct *, int),
-+					   int weight)
-+{
-+	set_bit(NAPI_STATE_THREADED, &napi->state);
-+	netif_napi_add(dev, napi, poll, weight);
-+}
-+
-+/**
-  *	netif_tx_napi_add - initialize a NAPI context
-  *	@dev:  network device
-  *	@napi: NAPI context
---- a/net/core/dev.c
-+++ b/net/core/dev.c
-@@ -159,6 +159,7 @@ static DEFINE_SPINLOCK(offload_lock);
- struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
- struct list_head ptype_all __read_mostly;	/* Taps */
- static struct list_head offload_base __read_mostly;
-+static struct workqueue_struct *napi_workq __read_mostly;
- 
- static int netif_rx_internal(struct sk_buff *skb);
- static int call_netdevice_notifiers_info(unsigned long val,
-@@ -6407,6 +6408,11 @@ void __napi_schedule(struct napi_struct
- {
- 	unsigned long flags;
- 
-+	if (test_bit(NAPI_STATE_THREADED, &n->state)) {
-+		queue_work(napi_workq, &n->work);
-+		return;
-+	}
-+
- 	local_irq_save(flags);
- 	____napi_schedule(this_cpu_ptr(&softnet_data), n);
- 	local_irq_restore(flags);
-@@ -6454,6 +6460,11 @@ EXPORT_SYMBOL(napi_schedule_prep);
-  */
- void __napi_schedule_irqoff(struct napi_struct *n)
- {
-+	if (test_bit(NAPI_STATE_THREADED, &n->state)) {
-+		queue_work(napi_workq, &n->work);
-+		return;
-+	}
-+
- 	____napi_schedule(this_cpu_ptr(&softnet_data), n);
- }
- EXPORT_SYMBOL(__napi_schedule_irqoff);
-@@ -6715,12 +6726,94 @@ static void init_gro_hash(struct napi_st
- 	napi->gro_bitmask = 0;
- }
- 
-+static int __napi_poll(struct napi_struct *n, bool *repoll)
-+{
-+	int work, weight;
-+
-+	weight = n->weight;
-+
-+	/* This NAPI_STATE_SCHED test is for avoiding a race
-+	 * with netpoll's poll_napi().  Only the entity which
-+	 * obtains the lock and sees NAPI_STATE_SCHED set will
-+	 * actually make the ->poll() call.  Therefore we avoid
-+	 * accidentally calling ->poll() when NAPI is not scheduled.
-+	 */
-+	work = 0;
-+	if (test_bit(NAPI_STATE_SCHED, &n->state)) {
-+		work = n->poll(n, weight);
-+		trace_napi_poll(n, work, weight);
-+	}
-+
-+	if (unlikely(work > weight))
-+		pr_err_once("NAPI poll function %pS returned %d, exceeding its budget of %d.\n",
-+			    n->poll, work, weight);
-+
-+	if (likely(work < weight))
-+		return work;
-+
-+	/* Drivers must not modify the NAPI state if they
-+	 * consume the entire weight.  In such cases this code
-+	 * still "owns" the NAPI instance and therefore can
-+	 * move the instance around on the list at-will.
-+	 */
-+	if (unlikely(napi_disable_pending(n))) {
-+		napi_complete(n);
-+		return work;
-+	}
-+
-+	if (n->gro_bitmask) {
-+		/* flush too old packets
-+		 * If HZ < 1000, flush all packets.
-+		 */
-+		napi_gro_flush(n, HZ >= 1000);
-+	}
-+
-+	gro_normal_list(n);
-+
-+	*repoll = true;
-+
-+	return work;
-+}
-+
-+static void napi_workfn(struct work_struct *work)
-+{
-+	struct napi_struct *n = container_of(work, struct napi_struct, work);
-+	void *have;
-+
-+	for (;;) {
-+		bool repoll = false;
-+
-+		local_bh_disable();
-+
-+		have = netpoll_poll_lock(n);
-+		__napi_poll(n, &repoll);
-+		netpoll_poll_unlock(have);
-+
-+		local_bh_enable();
-+
-+		if (!repoll)
-+			return;
-+
-+		if (!need_resched())
-+			continue;
-+
-+		/*
-+		 * have to pay for the latency of task switch even if
-+		 * napi is scheduled
-+		 */
-+		queue_work(napi_workq, work);
-+		return;
-+	}
-+}
-+
- void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
- 		    int (*poll)(struct napi_struct *, int), int weight)
- {
- 	if (WARN_ON(test_and_set_bit(NAPI_STATE_LISTED, &napi->state)))
- 		return;
- 
-+	if (dev->threaded)
-+		set_bit(NAPI_STATE_THREADED, &napi->state);
- 	INIT_LIST_HEAD(&napi->poll_list);
- 	INIT_HLIST_NODE(&napi->napi_hash_node);
- 	hrtimer_init(&napi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
-@@ -6738,6 +6831,7 @@ void netif_napi_add(struct net_device *d
- #ifdef CONFIG_NETPOLL
- 	napi->poll_owner = -1;
- #endif
-+	INIT_WORK(&napi->work, napi_workfn);
- 	set_bit(NAPI_STATE_SCHED, &napi->state);
- 	set_bit(NAPI_STATE_NPSVC, &napi->state);
- 	list_add_rcu(&napi->dev_list, &dev->napi_list);
-@@ -6780,6 +6874,7 @@ void __netif_napi_del(struct napi_struct
- 	if (!test_and_clear_bit(NAPI_STATE_LISTED, &napi->state))
- 		return;
- 
-+	cancel_work_sync(&napi->work);
- 	napi_hash_del(napi);
- 	list_del_rcu(&napi->dev_list);
- 	napi_free_frags(napi);
-@@ -6791,53 +6886,19 @@ EXPORT_SYMBOL(__netif_napi_del);
- 
- static int napi_poll(struct napi_struct *n, struct list_head *repoll)
- {
-+	bool do_repoll = false;
- 	void *have;
--	int work, weight;
-+	int work;
- 
- 	list_del_init(&n->poll_list);
- 
- 	have = netpoll_poll_lock(n);
- 
--	weight = n->weight;
-+	work = __napi_poll(n, &do_repoll);
- 
--	/* This NAPI_STATE_SCHED test is for avoiding a race
--	 * with netpoll's poll_napi().  Only the entity which
--	 * obtains the lock and sees NAPI_STATE_SCHED set will
--	 * actually make the ->poll() call.  Therefore we avoid
--	 * accidentally calling ->poll() when NAPI is not scheduled.
--	 */
--	work = 0;
--	if (test_bit(NAPI_STATE_SCHED, &n->state)) {
--		work = n->poll(n, weight);
--		trace_napi_poll(n, work, weight);
--	}
--
--	if (unlikely(work > weight))
--		pr_err_once("NAPI poll function %pS returned %d, exceeding its budget of %d.\n",
--			    n->poll, work, weight);
--
--	if (likely(work < weight))
-+	if (!do_repoll)
- 		goto out_unlock;
- 
--	/* Drivers must not modify the NAPI state if they
--	 * consume the entire weight.  In such cases this code
--	 * still "owns" the NAPI instance and therefore can
--	 * move the instance around on the list at-will.
--	 */
--	if (unlikely(napi_disable_pending(n))) {
--		napi_complete(n);
--		goto out_unlock;
--	}
--
--	if (n->gro_bitmask) {
--		/* flush too old packets
--		 * If HZ < 1000, flush all packets.
--		 */
--		napi_gro_flush(n, HZ >= 1000);
--	}
--
--	gro_normal_list(n);
--
- 	/* Some drivers may have called napi_schedule
- 	 * prior to exhausting their budget.
- 	 */
-@@ -11333,6 +11394,10 @@ static int __init net_dev_init(void)
- 		sd->backlog.weight = weight_p;
- 	}
- 
-+	napi_workq = alloc_workqueue("napi_workq", WQ_UNBOUND | WQ_HIGHPRI,
-+				     WQ_UNBOUND_MAX_ACTIVE | WQ_SYSFS);
-+	BUG_ON(!napi_workq);
-+
- 	dev_boot_phase = 0;
- 
- 	/* The loopback device is special if any other network devices
diff --git a/target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch b/target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch
deleted file mode 100644
index 279ae2c25a..0000000000
--- a/target/linux/generic/pending-5.10/691-net-add-sysfs-attribute-for-enabling-threaded-NAPI.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Date: Fri, 21 Aug 2020 15:07:54 +0200
-Subject: [PATCH] net: add sysfs attribute for enabling threaded NAPI
-
-This can be used to enable threaded NAPI on drivers that did not explicitly
-request it.
-
-Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/core/net-sysfs.c
-+++ b/net/core/net-sysfs.c
-@@ -472,6 +472,52 @@ static ssize_t proto_down_store(struct d
- }
- NETDEVICE_SHOW_RW(proto_down, fmt_dec);
- 
-+static int change_napi_threaded(struct net_device *dev, unsigned long val)
-+{
-+	struct napi_struct *napi;
-+
-+	if (list_empty(&dev->napi_list))
-+		return -EOPNOTSUPP;
-+
-+	list_for_each_entry(napi, &dev->napi_list, dev_list) {
-+		if (val)
-+			set_bit(NAPI_STATE_THREADED, &napi->state);
-+		else
-+			clear_bit(NAPI_STATE_THREADED, &napi->state);
-+	}
-+
-+	return 0;
-+}
-+
-+static ssize_t napi_threaded_store(struct device *dev,
-+				struct device_attribute *attr,
-+				const char *buf, size_t len)
-+{
-+	return netdev_store(dev, attr, buf, len, change_napi_threaded);
-+}
-+
-+static ssize_t napi_threaded_show(struct device *dev,
-+				  struct device_attribute *attr,
-+				  char *buf)
-+{
-+	struct net_device *netdev = to_net_dev(dev);
-+	struct napi_struct *napi;
-+	bool enabled = false;
-+
-+	if (!rtnl_trylock())
-+		return restart_syscall();
-+
-+	list_for_each_entry(napi, &netdev->napi_list, dev_list) {
-+		if (test_bit(NAPI_STATE_THREADED, &napi->state))
-+			enabled = true;
-+	}
-+
-+	rtnl_unlock();
-+
-+	return sprintf(buf, fmt_dec, enabled);
-+}
-+static DEVICE_ATTR_RW(napi_threaded);
-+
- static ssize_t phys_port_id_show(struct device *dev,
- 				 struct device_attribute *attr, char *buf)
- {
-@@ -564,6 +610,7 @@ static struct attribute *net_class_attrs
- 	&dev_attr_tx_queue_len.attr,
- 	&dev_attr_gro_flush_timeout.attr,
- 	&dev_attr_napi_defer_hard_irqs.attr,
-+	&dev_attr_napi_threaded.attr,
- 	&dev_attr_phys_port_id.attr,
- 	&dev_attr_phys_port_name.attr,
- 	&dev_attr_phys_switch_id.attr,