diff --git a/target/linux/mediatek/patches-5.4/7002-net-fix-premature-exit-from-napi-state-polling-in-napi-disable-v2.patch b/target/linux/mediatek/patches-5.4/7002-net-fix-premature-exit-from-napi-state-polling-in-napi-disable-v2.patch
new file mode 100644
index 0000000..0daf233
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/7002-net-fix-premature-exit-from-napi-state-polling-in-napi-disable-v2.patch
@@ -0,0 +1,114 @@
+From git@z Thu Jan  1 00:00:00 1970
+Subject: [PATCH v2] net: fix premature exit from NAPI state polling in napi_disable()
+From: Alexander Lobakin <alexandr.lobakin@intel.com>
+Date: Wed, 10 Nov 2021 20:56:05 +0100
+Message-Id: <20211110195605.1304-1-alexandr.lobakin@intel.com>
+To: "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>
+Cc: Alexander Lobakin <alexandr.lobakin@intel.com>, Jesse Brandeburg <jesse.brandeburg@intel.com>, Maciej Fijalkowski <maciej.fijalkowski@intel.com>, Michal Swiatkowski <michal.swiatkowski@intel.com>, Xuan Zhuo <xuanzhuo@linux.alibaba.com>, Antoine Tenart <atenart@kernel.org>, Eric Dumazet <edumazet@google.com>, Wei Wang <weiwan@google.com>,Björn Töpel <bjorn@kernel.org>, netdev@vger.kernel.org, linux-kernel@vger.kernel.org
+List-Id: <linux-kernel.vger.kernel.org>
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 7bit
+
+Commit 719c57197010 ("net: make napi_disable() symmetric with
+enable") accidentally introduced a bug sometimes leading to a kernel
+BUG when bringing an iface up/down under heavy traffic load.
+
+Prior to this commit, napi_disable() was polling n->state until
+none of (NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC) is set and then
+always flip them. Now there's a possibility to get away with the
+NAPIF_STATE_SCHE unset as 'continue' drops us to the cmpxchg()
+call with an unitialized variable, rather than straight to
+another round of the state check.
+
+Error path looks like:
+
+napi_disable():
+unsigned long val, new; /* new is uninitialized */
+
+do {
+	val = READ_ONCE(n->state); /* NAPIF_STATE_NPSVC and/or
+				      NAPIF_STATE_SCHED is set */
+	if (val & (NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC)) { /* true */
+		usleep_range(20, 200);
+		continue; /* go straight to the condition check */
+	}
+	new = val | <...>
+} while (cmpxchg(&n->state, val, new) != val); /* state == val, cmpxchg()
+						  writes garbage */
+
+napi_enable():
+do {
+	val = READ_ONCE(n->state);
+	BUG_ON(!test_bit(NAPI_STATE_SCHED, &val)); /* 50/50 boom */
+<...>
+
+while the typical BUG splat is like:
+
+[  172.652461] ------------[ cut here ]------------
+[  172.652462] kernel BUG at net/core/dev.c:6937!
+[  172.656914] invalid opcode: 0000 [#1] PREEMPT SMP PTI
+[  172.661966] CPU: 36 PID: 2829 Comm: xdp_redirect_cp Tainted: G          I       5.15.0 #42
+[  172.670222] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0014.082620210524 08/26/2021
+[  172.680646] RIP: 0010:napi_enable+0x5a/0xd0
+[  172.684832] Code: 07 49 81 cc 00 01 00 00 4c 89 e2 48 89 d8 80 e6 fb f0 48 0f b1 55 10 48 39 c3 74 10 48 8b 5d 10 f6 c7 04 75 3d f6 c3 01 75 b4 <0f> 0b 5b 5d 41 5c c3 65 ff 05 b8 e5 61 53 48 c7 c6 c0 f3 34 ad 48
+[  172.703578] RSP: 0018:ffffa3c9497477a8 EFLAGS: 00010246
+[  172.708803] RAX: ffffa3c96615a014 RBX: 0000000000000000 RCX: ffff8a4b575301a0
+< snip >
+[  172.782403] Call Trace:
+[  172.784857]  <TASK>
+[  172.786963]  ice_up_complete+0x6f/0x210 [ice]
+[  172.791349]  ice_xdp+0x136/0x320 [ice]
+[  172.795108]  ? ice_change_mtu+0x180/0x180 [ice]
+[  172.799648]  dev_xdp_install+0x61/0xe0
+[  172.803401]  dev_xdp_attach+0x1e0/0x550
+[  172.807240]  dev_change_xdp_fd+0x1e6/0x220
+[  172.811338]  do_setlink+0xee8/0x1010
+[  172.814917]  rtnl_setlink+0xe5/0x170
+[  172.818499]  ? bpf_lsm_binder_set_context_mgr+0x10/0x10
+[  172.823732]  ? security_capable+0x36/0x50
+< snip >
+
+Fix this by replacing 'do { } while (cmpxchg())' with an "infinite"
+for-loop with an explicit break.
+
+From v1 [0]:
+ - just use a for-loop to simplify both the fix and the existing
+   code (Eric).
+
+[0] https://lore.kernel.org/netdev/20211110191126.1214-1-alexandr.lobakin@intel.com
+
+Fixes: 719c57197010 ("net: make napi_disable() symmetric with enable")
+Suggested-by: Eric Dumazet <edumazet@google.com> # for-loop
+Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
+Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
+Reviewed-by: Eric Dumazet <edumazet@google.com>
+---
+ net/core/dev.c | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/net/core/dev.c b/net/core/dev.c
+index c8f7c15..fe2c856 100644
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -6391,7 +6391,7 @@ void napi_disable(struct napi_struct *n)
+ 	might_sleep();
+ 	set_bit(NAPI_STATE_DISABLE, &n->state);
+ 
+-	do {
++	for ( ; ; ) {
+ 		val = READ_ONCE(n->state);
+ 		if (val & (NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC)) {
+ 			usleep_range(20, 200);
+@@ -6400,7 +6400,10 @@ void napi_disable(struct napi_struct *n)
+ 
+ 		new = val | NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC;
+ 		new &= ~(NAPIF_STATE_THREADED);
+-	} while (cmpxchg(&n->state, val, new) != val);
++
++		if (cmpxchg(&n->state, val, new) == val)
++			break;
++	}
+ 
+ 	hrtimer_cancel(&n->timer);
+