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charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Exchange-RoutingPolicyChecked: ZJY9nEUgyNaov1Z9nQ93omyOIW6YUCFa11Iqc0gT6Hfcg22pm4Pdts5vjEn0qc1qVHMRzNOV82z160P8ezNwIGQMsq20/qqLKD8Jh99oPJiTvhPgKTJj/YBeYzImJBpkBIONuAMGSFRVX5yIbKFmpTJOcav0VKhLZ5OWGx2EqoQFKJGSSqhXu1WlimCFk/Mngw/qAmtaYJi4/02gb35xc38Ms3gq5oK/f6rvtvuotWwQyYf8wR7c/LqLIP6MqQWg0/0f0BqRSojvf7zwzVoFzD7MWMkhpzFPWSfRSrQKyBtHFd1waCDfp2BFUHkNWA1O7IVF/7z7bat5FgZbMFkxgA== X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: KUYPR03MB9952.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: b0c43337-8994-42aa-3832-08def94d1b3e X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Aug 2026 15:11:09.7971 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a7687ede-7a6b-4ef6-bace-642f677fbe31 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 6MxdSEWuvo1z/CuzHMI38hHEiJoEmNwogkn1Ms4mJJwx6n2CJciiqLUNs/epDTa/RZShUcso+oe39AlBNyq5eQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SI4PR03MB10102 X-MTK: N Hi Bert, Thanks for your feedback. Actually, we encountered the same issue during ou= r internal testing and have already submitted a fix. The solution is basica= lly the same. https://patchwork.kernel.org/project/linux-wireless/patch/20260805092409.14= 89401-1-eason.lai@mediatek.com/ Sorry for any bother with this issue. BRs, Emery -----Original Message----- From: Bert Karwatzki =20 Sent: Thursday, August 13, 2026 10:58 PM To: Emery Hsin (=E8=BE=9B=E6=89=BF=E5=AE=A3) Cc: Bert Karwatzki ; Felix Fietkau ; linux-= kernel@vger.kernel.org; linux-wireless@vger.kernel.org; linux-next@vger.ker= nel.org; JB Tsai (=E8=94=A1=E5=BF=97=E5=BD=AC) ; Dere= n Wu (=E6=AD=A6=E5=BE=B7=E4=BB=81) ; Leon Yen (=E9= =A1=8F=E8=89=AF=E5=84=92) ; Quan Zhou (=E5=91=A8=E5= =85=A8) ; Ryder Lee ; Sean = Wang ; linux-mediatek@lists.infradead.org; Litien C= hang (=E5=BC=B5=E7=AB=8B=E5=85=B8) ; lorenzo@ker= nel.org Subject: [PATCH] wifi: mt76: mt7925: remove wm2_complete_mask from mt7925_i= rq_map Commit c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx irq masks with per-chi= p definitions") introduces a non-NULL wm2_complete_mask element to mt7925_i= rq_map. This gives a NULL pointer dereference error when resuming from hibe= rnate: [ T2001] BUG: kernel NULL pointer dereference, address: 0000000000000a98 [ = T2001] #PF: supervisor write access in kernel mode [ T2001] #PF: error_code= (0x0002) - not-present page [ T2001] PGD 0 P4D 0 [ T2001] Oops: Oops: 0002 = [#1] SMP NOPTI [ T2001] CPU: 5 UID: 0 PID: 2001 Comm: kworker/u128:4 Tainted: G W = 7.2.0-rc4-bisect-00876-gc4edf9e3e0e5-dirty #746 PREEMPT_RT [ T2001] Tainted: [W]=3DWARN [ T2001] Hardware name: ASUS System Product Name/ROG STRIX B850-F GAMING WI= FI, BIOS 1627 02/05/2026 [ T2001] Workqueue: mt76 mt7925_mac_reset_work [mt= 7925_common] [ T2001] RIP: 0010:mutex_lock+0xe/0x30 [ T2001] Code: 75 07 31= c0 c3 cc cc cc cc be 01 00 00 00 e9 79 fe ff ff 66 0f 1f 84 00 00 00 00 00= f3 0f 1e fa 65 48 8b 15 94 13 83 00 31 c0 48 0f b1 57 18 75 05 c3 cc = cc cc cc be 02 00 00 00 e9 4b fe ff [ T2001] RSP: 0018:ffffa53dc250fdc8 EFL= AGS: 00010246 [ T2001] RAX: 0000000000000000 RBX: ffff951e8d0e3420 RCX: 000= 0000000000000 [ T2001] RDX: ffff951f64f145c0 RSI: 0000000000000002 RDI: 000= 0000000000a80 [ T2001] RBP: 0000000000000000 R08: 0000000000000004 R09: 000= 0000000000001 [ T2001] R10: 0000000000000000 R11: 0000000000000004 R12: fff= f951e8d0e3020 [ T2001] R13: ffff951e8d0e2680 R14: ffff951e8d0e0aa0 R15: 000= 0000000000000 [ T2001] FS: 0000000000000000(0000) GS:ffff952ccc8b3000(0000= ) knlGS:0000000000000000 [ T2001] CS: 0010 DS: 0000 ES: 0000 CR0: 00000000= 80050033 [ T2001] CR2: 0000000000000a98 CR3: 000000050641e000 CR4: 00000000= 00f50ef0 [ T2001] PKRU: 55555554 [ T2001] Call Trace: [ T2001] [ T2001] ? napi_disable+0x18/0x40 [ T2001] ? mt7925e_mac_reset+0x2f8/0x390 [mt7925e] [ T2001] ? mt7925_mac_= reset_work+0x98/0x1c0 [mt7925_common] [ T2001] ? drm_sched_run_job_work+0x= 1c/0x2d0 [gpu_sched] [ T2001] ? pwq_dec_nr_in_flight+0x29a/0x3a0 [ T2001] = ? process_one_work+0x199/0x2a0 [ T2001] ? worker_thread+0x1a0/0x2f0 [ T20= 01] ? rescuer_thread+0x550/0x550 [ T2001] ? kthread+0xd1/0x110 [ T2001] = ? kthread_affine_node+0x100/0x100 [ T2001] ? ret_from_fork+0x1f9/0x2b0 [ T= 2001] ? kthread_affine_node+0x100/0x100 [ T2001] ? kthread_affine_node+0x= 100/0x100 [ T2001] ? ret_from_fork_asm+0x11/0x20 [ T2001] Remove wm2_complete_mask from mt7925_irq_map to fix the issue. Fixes: c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx irq masks with = per-chip definitions") Signed-off-by: Bert Karwatzki --- drivers/net/wireless/mediatek/mt76/mt7925/pci.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/= wireless/mediatek/mt76/mt7925/pci.c index 02ef09dd797d..d2c0a78ae9f2 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c @@ -493,7 +493,6 @@ static const struct mt792x_irq_map mt7925_irq_map =3D { .all_complete_mask =3D MT7925_INT_RX_DONE_ALL, .data_complete_mask =3D MT7925_INT_RX_DONE_DATA, .wm_complete_mask =3D MT7925_INT_RX_DONE_WM, - .wm2_complete_mask =3D MT_INT_RX_DONE_WM2, }, }; =20 -- 2.55.0 I noticed that my debian sid system running linux next-20260812 would resum= e from hibernation either displaying a frozen GUI or show the mentioned bac= ktrace in dmesg and freezing seconds after that. I bisected the issue to co= mmit c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx irq masks with per-chi= p definitions") which introduces a non-NULL wm2_complete_mask to mt7925_irq= _map. Removing wm2_complete_mask from mt7925_irq_map fixes the issue in next-2026= 0812. Bert Karwatzki