Re: [tip: irq/core] genirq: Warn about using IRQF_ONESHOT without a threaded handler
From: Bert Karwatzki
Date: Mon Feb 02 2026 - 18:29:12 EST
Since commit
aef30c8d569c ("genirq: Warn about using IRQF_ONESHOT without a threaded handler")
has been merged into linux-next the following warning appears when booting my
MSI Alpha 15 laptop (running linux-next-20260130 with debian stable/trixie):
[ 8.436584] [ T1180] ------------[ cut here ]------------
[ 8.436811] [ T1180] WARNING: kernel/irq/manage.c:1502 at __setup_irq+0x4fa/0x730, CPU#15: iio-sensor-prox/1180
[ 8.436817] [ T1180] Modules linked in: rfcomm bnep nls_ascii nls_cp437 vfat fat snd_hda_codec_generic btusb btrtl snd_hda_codec_atihdmi btintel snd_hda_codec_hdmi btbcm uvcvideo btmtk videobuf2_vmalloc videobuf2_memops snd_hda_intel uvc videobuf2_v4l2 snd_intel_dspcfg snd_hda_codec snd_acp3x_rn snd_soc_dmic snd_acp3x_pdm_dma bluetooth snd_hda_core snd_soc_core snd_hwdep videodev snd_pcm_oss snd_mixer_oss snd_pcm snd_rn_pci_acp3x hid_sensor_magn_3d hid_sensor_prox hid_sensor_accel_3d hid_sensor_als hid_sensor_gyro_3d videobuf2_common snd_acp_config snd_soc_acpi hid_sensor_trigger msi_wmi ecdh_generic ecc mc sparse_keymap wmi_bmof snd_timer k10temp snd snd_pci_acp3x ccp ac soundcore industrialio_triggered_buffer battery kfifo_buf button industrialio amd_pmc hid_sensor_iio_common joydev evdev mt7921e mt7921_common mt792x_lib mt76_connac_lib mt76 mac80211 libarc4 cfg80211 rfkill msr fuse nvme_fabrics efi_pstore configfs efivarfs autofs4 ext4 mbcache jbd2 usbhid amdgpu amdxcp i2c_algo_bit drm_client_lib drm_ttm_helper ttm xhci_pci
[ 8.437165] [ T1180] drm_exec drm_panel_backlight_quirks xhci_hcd gpu_sched drm_suballoc_helper hid_sensor_hub drm_buddy mfd_core hid_multitouch hid_generic drm_display_helper usbcore i2c_hid_acpi psmouse amd_sfh i2c_hid drm_kms_helper nvme hid serio_raw nvme_core r8169 i2c_piix4 cec i2c_smbus usb_common crc16 i2c_designware_platform i2c_designware_core
[ 8.437185] [ T1180] CPU: 15 UID: 0 PID: 1180 Comm: iio-sensor-prox Tainted: G W 6.19.0-rc7-next-20260130-iiodebug-00002-g2875feff2cee #292 PREEMPT(full)
[ 8.437188] [ T1180] Tainted: [W]=WARN
[ 8.437189] [ T1180] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-158L, BIOS E158LAMS.10F 11/11/2024
[ 8.437190] [ T1180] RIP: 0010:__setup_irq+0x4fa/0x730
[ 8.437193] [ T1180] Code: e7 e8 ca 6f 00 00 e9 7e fd ff ff b8 01 00 00 00 48 c7 c2 ff ff ff ff f3 48 0f bc d2 c4 e2 e9 f7 c0 48 89 43 48 e9 d8 fd ff ff <0f> 0b 85 c9 0f 85 8c 00 00 00 81 e2 00 00 01 00 0f 85 7d fb ff ff
[ 8.437194] [ T1180] RSP: 0018:ffffc3b6c46d7c70 EFLAGS: 00010246
[ 8.437196] [ T1180] RAX: 0000000000002000 RBX: ffffa04c05503e80 RCX: 0000000000000000
[ 8.437197] [ T1180] RDX: 0000000000000400 RSI: ffffa04c112e0e00 RDI: ffffffffc181cac0
[ 8.437198] [ T1180] RBP: 0000000000000077 R08: 0000000000000000 R09: ffffa04c05503e80
[ 8.437199] [ T1180] R10: 0000000000000001 R11: 0000000000000003 R12: 0000000000000077
[ 8.437200] [ T1180] R13: ffffa04c112e0e00 R14: ffffa04c112e0e00 R15: ffffa04c05503e80
[ 8.437201] [ T1180] FS: 00007f447c23f940(0000) GS:ffffa04f2cb1d000(0000) knlGS:0000000000000000
[ 8.437203] [ T1180] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 8.437204] [ T1180] CR2: 0000559507dd86d8 CR3: 0000000103b55000 CR4: 0000000000750ef0
[ 8.437205] [ T1180] PKRU: 55555554
[ 8.437206] [ T1180] Call Trace:
[ 8.437207] [ T1180] <TASK>
[ 8.437209] [ T1180] request_threaded_irq+0xdf/0x170
[ 8.437213] [ T1180] iio_trigger_attach_poll_func.cold+0x3e/0x111 [industrialio]
[ 8.437220] [ T1180] __iio_update_buffers.cold+0x5c/0x70 [industrialio]
[ 8.437224] [ T1180] ? __entry_text_end+0x1021d7/0x1021db
[ 8.437227] [ T1180] ? _dev_info+0x6a/0x84
[ 8.437232] [ T1180] enable_store+0x95/0xe7 [industrialio]
[ 8.437236] [ T1180] kernfs_fop_write_iter+0x14b/0x200
[ 8.437240] [ T1180] vfs_write+0x21d/0x420
[ 8.437244] [ T1180] ksys_write+0x5e/0xd0
[ 8.437246] [ T1180] do_syscall_64+0x66/0x380
[ 8.437250] [ T1180] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 8.437252] [ T1180] RIP: 0033:0x7f447c6459ee
[ 8.437254] [ T1180] Code: 08 0f 85 f5 4b ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
[ 8.437255] [ T1180] RSP: 002b:00007ffc44efa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 8.437257] [ T1180] RAX: ffffffffffffffda RBX: 00007f447c23f940 RCX: 00007f447c6459ee
[ 8.437258] [ T1180] RDX: 0000000000000001 RSI: 00007ffc44efa210 RDI: 0000000000000008
[ 8.437259] [ T1180] RBP: 00007ffc44efa210 R08: 0000000000000000 R09: 0000000000000000
[ 8.437260] [ T1180] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[ 8.437261] [ T1180] R13: 0000559507d382a0 R14: 00007f447c78fee0 R15: 0000000000000001
[ 8.437263] [ T1180] </TASK>
[ 8.437264] [ T1180] ---[ end trace 0000000000000000 ]---
The warning appears because iio_triggered_buffer_setup_ext() (in
drivers/iio/buffer/industrialio-triggered-buffer.c) is called with thread = NULL
during the probe of the iio device and calls iio_alloc_pollfunc()
(in drivers/iio/industrialio-trigger.c) with thread = NULL and type = IRQF_ONESHOT.
A simple fix could be this:
diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c
index 9bf75dee7ff8..40eea3a44724 100644
--- a/drivers/iio/buffer/industrialio-triggered-buffer.c
+++ b/drivers/iio/buffer/industrialio-triggered-buffer.c
@@ -64,7 +64,7 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev,
indio_dev->pollfunc = iio_alloc_pollfunc(h,
thread,
- IRQF_ONESHOT,
+ thread ? IRQF_ONESHOT : 0,
indio_dev,
"%s_consumer%d",
indio_dev->name,
Are there any problems with this?
Bert Karwatzki