diff --git a/target/linux/generic/backport-5.4/602-v5.12-net-add-sysfs-attribute-to-control-napi-threaded-mod.patch b/target/linux/generic/backport-5.4/602-v5.12-net-add-sysfs-attribute-to-control-napi-threaded-mod.patch
new file mode 100644
index 0000000..05c40a9
--- /dev/null
+++ b/target/linux/generic/backport-5.4/602-v5.12-net-add-sysfs-attribute-to-control-napi-threaded-mod.patch
@@ -0,0 +1,177 @@
+From: Wei Wang <weiwan@google.com>
+Date: Mon, 8 Feb 2021 11:34:10 -0800
+Subject: [PATCH] net: add sysfs attribute to control napi threaded mode
+
+This patch adds a new sysfs attribute to the network device class.
+Said attribute provides a per-device control to enable/disable the
+threaded mode for all the napi instances of the given network device,
+without the need for a device up/down.
+User sets it to 1 or 0 to enable or disable threaded mode.
+Note: when switching between threaded and the current softirq based mode
+for a napi instance, it will not immediately take effect if the napi is
+currently being polled. The mode switch will happen for the next time
+napi_schedule() is called.
+
+Co-developed-by: Paolo Abeni <pabeni@redhat.com>
+Signed-off-by: Paolo Abeni <pabeni@redhat.com>
+Co-developed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
+Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
+Co-developed-by: Felix Fietkau <nbd@nbd.name>
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+Signed-off-by: Wei Wang <weiwan@google.com>
+Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+
+--- a/Documentation/ABI/testing/sysfs-class-net
++++ b/Documentation/ABI/testing/sysfs-class-net
+@@ -301,3 +301,18 @@ Contact:	netdev@vger.kernel.org
+ Description:
+ 		32-bit unsigned integer counting the number of times the link has
+ 		been down
++
++What:		/sys/class/net/<iface>/threaded
++Date:		Jan 2021
++KernelVersion:	5.12
++Contact:	netdev@vger.kernel.org
++Description:
++		Boolean value to control the threaded mode per device. User could
++		set this value to enable/disable threaded mode for all napi
++		belonging to this device, without the need to do device up/down.
++
++		Possible values:
++		== ==================================
++		0  threaded mode disabled for this dev
++		1  threaded mode enabled for this dev
++		== ==================================
+--- a/include/linux/netdevice.h
++++ b/include/linux/netdevice.h
+@@ -507,6 +507,8 @@ static inline bool napi_complete(struct
+  */
+ bool napi_hash_del(struct napi_struct *napi);
+ 
++int dev_set_threaded(struct net_device *dev, bool threaded);
++
+ /**
+  *	napi_disable - prevent NAPI from scheduling
+  *	@n: NAPI context
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -3917,8 +3917,9 @@ static inline void ____napi_schedule(str
+ 
+ 	if (test_bit(NAPI_STATE_THREADED, &napi->state)) {
+ 		/* Paired with smp_mb__before_atomic() in
+-		 * napi_enable(). Use READ_ONCE() to guarantee
+-		 * a complete read on napi->thread. Only call
++		 * napi_enable()/dev_set_threaded().
++		 * Use READ_ONCE() to guarantee a complete
++		 * read on napi->thread. Only call
+ 		 * wake_up_process() when it's not NULL.
+ 		 */
+ 		thread = READ_ONCE(napi->thread);
+@@ -6296,6 +6297,49 @@ static void init_gro_hash(struct napi_st
+ 	napi->gro_bitmask = 0;
+ }
+ 
++int dev_set_threaded(struct net_device *dev, bool threaded)
++{
++	struct napi_struct *napi;
++	int err = 0;
++
++	if (dev->threaded == threaded)
++		return 0;
++
++	if (threaded) {
++		list_for_each_entry(napi, &dev->napi_list, dev_list) {
++			if (!napi->thread) {
++				err = napi_kthread_create(napi);
++				if (err) {
++					threaded = false;
++					break;
++				}
++			}
++		}
++	}
++
++	dev->threaded = threaded;
++
++	/* Make sure kthread is created before THREADED bit
++	 * is set.
++	 */
++	smp_mb__before_atomic();
++
++	/* Setting/unsetting threaded mode on a napi might not immediately
++	 * take effect, if the current napi instance is actively being
++	 * polled. In this case, the switch between threaded mode and
++	 * softirq mode will happen in the next round of napi_schedule().
++	 * This should not cause hiccups/stalls to the live traffic.
++	 */
++	list_for_each_entry(napi, &dev->napi_list, dev_list) {
++		if (threaded)
++			set_bit(NAPI_STATE_THREADED, &napi->state);
++		else
++			clear_bit(NAPI_STATE_THREADED, &napi->state);
++	}
++
++	return err;
++}
++
+ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
+ 		    int (*poll)(struct napi_struct *, int), int weight)
+ {
+--- a/net/core/net-sysfs.c
++++ b/net/core/net-sysfs.c
+@@ -557,6 +557,45 @@ static ssize_t phys_switch_id_show(struc
+ }
+ static DEVICE_ATTR_RO(phys_switch_id);
+ 
++static ssize_t threaded_show(struct device *dev,
++			     struct device_attribute *attr, char *buf)
++{
++	struct net_device *netdev = to_net_dev(dev);
++	ssize_t ret = -EINVAL;
++
++	if (!rtnl_trylock())
++		return restart_syscall();
++
++	if (dev_isalive(netdev))
++		ret = sprintf(buf, fmt_dec, netdev->threaded);
++
++	rtnl_unlock();
++	return ret;
++}
++
++static int modify_napi_threaded(struct net_device *dev, unsigned long val)
++{
++	int ret;
++
++	if (list_empty(&dev->napi_list))
++		return -EOPNOTSUPP;
++
++	if (val != 0 && val != 1)
++		return -EOPNOTSUPP;
++
++	ret = dev_set_threaded(dev, val);
++
++	return ret;
++}
++
++static ssize_t threaded_store(struct device *dev,
++			      struct device_attribute *attr,
++			      const char *buf, size_t len)
++{
++	return netdev_store(dev, attr, buf, len, modify_napi_threaded);
++}
++static DEVICE_ATTR_RW(threaded);
++
+ static struct attribute *net_class_attrs[] __ro_after_init = {
+ 	&dev_attr_netdev_group.attr,
+ 	&dev_attr_type.attr,
+@@ -587,6 +626,7 @@ static struct attribute *net_class_attrs
+ 	&dev_attr_proto_down.attr,
+ 	&dev_attr_carrier_up_count.attr,
+ 	&dev_attr_carrier_down_count.attr,
++	&dev_attr_threaded.attr,
+ 	NULL,
+ };
+ ATTRIBUTE_GROUPS(net_class);