{"id":2220767,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2220767/?format=json","web_url":"http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20260408004333.236687-2-acelan.kao@canonical.com/","project":{"id":15,"url":"http://patchwork.ozlabs.org/api/1.1/projects/15/?format=json","name":"Ubuntu Kernel","link_name":"ubuntu-kernel","list_id":"kernel-team.lists.ubuntu.com","list_email":"kernel-team@lists.ubuntu.com","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260408004333.236687-2-acelan.kao@canonical.com>","date":"2026-04-08T00:43:33","name":"[SRU,R,1/1] wifi: mt76: mt792x: Fix a potential deadlock in high-load situations","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c8b2e698179438ede3a7ff606127541a7b0834f6","submitter":{"id":2976,"url":"http://patchwork.ozlabs.org/api/1.1/people/2976/?format=json","name":"AceLan Kao","email":"acelan.kao@canonical.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20260408004333.236687-2-acelan.kao@canonical.com/mbox/","series":[{"id":499055,"url":"http://patchwork.ozlabs.org/api/1.1/series/499055/?format=json","web_url":"http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=499055","date":"2026-04-08T00:43:32","name":"System doesn't response with mt76 call trace","version":1,"mbox":"http://patchwork.ozlabs.org/series/499055/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2220767/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220767/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=bpqKTM4+;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fr47W2V6pz1yD3\n\tfor ; Wed, 08 Apr 2026 10:43:51 +1000 (AEST)","from localhost ([127.0.0.1] helo=lists.ubuntu.com)\n\tby lists.ubuntu.com with esmtp (Exim 4.86_2)\n\t(envelope-from )\n\tid 1wAH1E-0001Gu-KF; Wed, 08 Apr 2026 00:43:44 +0000","from mail-qv1-f44.google.com ([209.85.219.44])\n by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.86_2) (envelope-from ) id 1wAH1C-0001Fz-Q3\n for kernel-team@lists.ubuntu.com; Wed, 08 Apr 2026 00:43:43 +0000","by mail-qv1-f44.google.com with SMTP id\n 6a1803df08f44-899a5db525cso52656106d6.3\n for ; Tue, 07 Apr 2026 17:43:42 -0700 (PDT)","from localhost (211-75-139-220.hinet-ip.hinet.net. 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Once the CPUs are available, there\nis a high possibility that the ps_work function and mac_work function will\nbe executed simultaneously, resulting in a possible deadlock.\n\nThis patch replaces cancel_delayed_work_sync() with cancel_delayed_work()\nin ps_work to eliminate the deadlock and make the code easier to maintain.\n\nSigned-off-by: Leon Yen \nTested-by: Chia-Lin Kao (AceLan) \nLink: https://patch.msgid.link/20251215122231.3180648-1-leon.yen@mediatek.com\nSigned-off-by: Felix Fietkau \n(cherry picked from commit bb2f07819d063a58756186cac6465341956ac0a4 linux-next)\nSigned-off-by: Chia-Lin Kao (AceLan) \n---\n drivers/net/wireless/mediatek/mt76/mt792x_mac.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_mac.c b/drivers/net/wireless/mediatek/mt76/mt792x_mac.c\nindex 71dec93094ebd..888e5a5056731 100644\n--- a/drivers/net/wireless/mediatek/mt76/mt792x_mac.c\n+++ b/drivers/net/wireless/mediatek/mt76/mt792x_mac.c\n@@ -375,7 +375,7 @@ void mt792x_pm_power_save_work(struct work_struct *work)\n \t}\n \n \tif (!mt792x_mcu_fw_pmctrl(dev)) {\n-\t\tcancel_delayed_work_sync(&mphy->mac_work);\n+\t\tcancel_delayed_work(&mphy->mac_work);\n \t\treturn;\n \t}\n out:\n","prefixes":["SRU","R","1/1"]}