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Leon.Yen@mediatek.com, Quan.Zhou@mediatek.com, Ryder.Lee@mediatek.com, Sean.Wang@mediatek.com, linux-mediatek@lists.infradead.org, litien.chang@mediatek.com, lorenzo@kernel.org Subject: [PATCH] wifi: mt76: mt7925: remove wm2_complete_mask from mt7925_irq_map Date: Thu, 13 Aug 2026 16:57:40 +0200 Message-ID: <20260813145741.8047-1-spasswolf@web.de> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260612075042.2577193-3-jb.tsai@mediatek.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:y9xZWd1xlGhxtnEoOO3b6kGGh7R4lKUFirM4FRmNn3nv4zsMoBJ NrTOzqLjSEfAUKzuY9qu7mFS6ncqJZmmXLa8r5eYAxSqdxv47NonJYpOopVKIntf7jq/rqH QuejFlpiom/QUW1ULnfgnAUeyS4r6Mhj2lX4Qw6+mSmjFji2qp+B+GzhCr2bKAwrN2xj1bF WxPnZIwhZrz2LScDmAw8Q== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:Hcjqk0DQ0oo=;g5mZI43kyAhtHjmW81RhWjU+ksY 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AxY2ij41hbbEfIv6e1Ap1tNQhENzHKFga4nPREJ400qHVwNwC/ldXvxS1ROWCUj5CCjnU6Rkr QDuj1RHOhCJLBGw3Iy3GkzBJq8e6yC1QFz5Mr96BGobNxUIy5z15xHd8SB+oihzvMm7MMV9cm Fexlx1ggzt5hiEUJLM67NBIfQvdumQB8Uh8Br+mjaiT7if/t5FO7VQMy4pGypDDJYtQcUmboe qNLoI0jryMUcH2PdJFQkPWHgD2sQ8hN3KdDML7P5kjFmJbJPI1qCacihXaAqTjLowxftDPW17 +cJdyeHiYr4nJNV5Gl67SA16676OZYvnhUxpmHRuWE40f0Jipz92lS81tUgVdQtusCjPd5Eb9 dYzWepIxLnXj2MoQ== Commit c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx irq masks with per-ch= ip definitions") introduces a non-NULL wm2_complete_mask element to mt7925_irq_map. This gives a NULL pointer dereference error when resuming from hibernate: [ 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 W= IFI, BIOS 1627 02/05/2026 [ T2001] Workqueue: mt76 mt7925_mac_reset_work [mt7925_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 EFLAGS: 00010246 [ T2001] RAX: 0000000000000000 RBX: ffff951e8d0e3420 RCX: 0000000000000000 [ T2001] RDX: ffff951f64f145c0 RSI: 0000000000000002 RDI: 0000000000000a80 [ T2001] RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000001 [ T2001] R10: 0000000000000000 R11: 0000000000000004 R12: ffff951e8d0e3020 [ T2001] R13: ffff951e8d0e2680 R14: ffff951e8d0e0aa0 R15: 0000000000000000 [ T2001] FS: 0000000000000000(0000) GS:ffff952ccc8b3000(0000) knlGS:00000= 00000000000 [ T2001] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ T2001] CR2: 0000000000000a98 CR3: 000000050641e000 CR4: 0000000000f50ef0 [ 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+0x1c/0x2d0 [gpu_sched] [ T2001] ? pwq_dec_nr_in_flight+0x29a/0x3a0 [ T2001] ? process_one_work+0x199/0x2a0 [ T2001] ? worker_thread+0x1a0/0x2f0 [ T2001] ? rescuer_thread+0x550/0x550 [ T2001] ? kthread+0xd1/0x110 [ T2001] ? kthread_affine_node+0x100/0x100 [ T2001] ? ret_from_fork+0x1f9/0x2b0 [ T2001] ? kthread_affine_node+0x100/0x100 [ T2001] ? kthread_affine_node+0x100/0x100 [ 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 =2D-- 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 =2D-- 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 =2D-=20 2.55.0 I noticed that my debian sid system running linux next-20260812 would resume from hibernation either displaying a frozen GUI or show the mentioned backtrace in dmesg and freezing seconds after that. I bisected the issue to commit=20 c4edf9e3e0e5 ("wifi: mt76: mt7925: replace shared rx irq masks with per-ch= ip 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-20260812. Bert Karwatzki