[REGRESSION] `lis3lv02d_i2c_suspend()` causes `unbalanced disables for regulator-dummy` and `Failed to disable Vdd_IO: -EIO`

[Paul Menzel <pmenzel@molgen.mpg.de>]

#regzbot introduced 2f189493ae32


Dear Linux folks,


Testing commit 2f189493ae32 (i2c: i801: Add lis3lv02d for Dell XPS 15 
7590) [1], it’s very likely this commit, it turns out, that Linux logs 
the warning below during ACPI S3 suspend:

```
[    0.000000] Linux version 6.8.0-rc2 (pmenzel@villette) (gcc (Debian 
13.2.0-12) 13.2.0, GNU ld (GNU Binutils for Debian) 2.41.90.20240122) #9 
SMP PREEMPT_DYNAMIC Mon Jan 29 15:49:07 CET 2024
[    0.000000] Command line: BOOT_IMAGE=/vmlinuz-6.8.0-rc2 
root=UUID=9fa41e21-7a5f-479e-afdc-9a5503368d8e ro cryptomgr.notests 
quiet rd.luks=1 rd.auto=1 initcall_debug log_buf_len=8M
[…]
[    0.000000] DMI: Dell Inc. XPS 15 7590/0VYV0G, BIOS 1.24.0 09/11/2023
[…]
[ 1528.577767] lis3lv02d_i2c 0-0029: PM: calling 
lis3lv02d_i2c_suspend+0x0/0x30 [lis3lv02d_i2c] @ 92, parent: i2c-0
[…]
[ 1528.578506] ------------[ cut here ]------------
[ 1528.578508] unbalanced disables for regulator-dummy
[ 1528.578522] WARNING: CPU: 1 PID: 92 at drivers/regulator/core.c:2999 
_regulator_disable+0xbb/0x190
[ 1528.578532] Modules linked in: snd_seq_dummy(E) snd_hrtimer(E) 
snd_seq(E) snd_seq_device(E) rfcomm(E) snd_sof_probes(E) 
snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) 
l2tp_ppp(E) l2tp_netlink(E) l2tp_core(E) ip6_udp_tunnel(E) udp_tunnel(E) 
pppox(E) ppp_generic(E) slhc(E) xfrm_interface(E) xfrm6_tunnel(E) 
tunnel6(E) xfrm_user(E) xfrm_algo(E) qrtr(E) cmac(E) algif_hash(E) 
algif_skcipher(E) af_alg(E) bnep(E) snd_sof_pci_intel_cnl(E) 
snd_sof_intel_hda_common(E) snd_sof_pci(E) snd_sof_xtensa_dsp(E) 
snd_sof_intel_hda(E) snd_sof(E) snd_sof_utils(E) 
snd_soc_acpi_intel_match(E) snd_soc_acpi(E) snd_soc_hdac_hda(E) 
binfmt_misc(E) iwlmvm(E) snd_soc_core(E) snd_compress(E) 
snd_sof_intel_hda_mlink(E) x86_pkg_temp_thermal(E) wacom(E) 
snd_hda_ext_core(E) intel_powerclamp(E) i915(E) mac80211(E) joydev(E) 
coretemp(E) iTCO_wdt(E) usbhid(E) hid_multitouch(E) kvm_intel(E) 
intel_pmc_bxt(E) lis3lv02d_i2c(E) hid_generic(E) iTCO_vendor_support(E) 
dell_laptop(E) snd_hda_intel(E) lis3lv02d(E) dell_wmi(E) mei_wdt(E)
[ 1528.578601]  nls_ascii(E) ledtrig_audio(E) ee1004(E) mei_hdcp(E) 
libarc4(E) mei_pxp(E) watchdog(E) nls_cp437(E) snd_intel_dspcfg(E) kvm(E)
[ 1528.578609] idma64 idma64.1: PM: platform_pm_suspend+0x0/0x50 
returned 0 after 742 usecs
[ 1528.578612]  snd_hda_codec(E) btusb(E) snd_hwdep(E) vfat(E) 
i2c_algo_bit(E) processor_thermal_device_pci_legacy(E) btrtl(E) 
uvcvideo(E) snd_hda_core(E) dell_smbios(E) btintel(E) fat(E)
[ 1528.578623] platform regulatory.0: PM: calling 
platform_pm_suspend+0x0/0x50 @ 70543, parent: platform
[ 1528.578625]  videobuf2_vmalloc(E) dcdbas(E) intel_rapl_msr(E) 
snd_pcm(E) irqbypass(E)
[ 1528.578628] platform regulatory.0: PM: platform_pm_suspend+0x0/0x50 
returned 0 after 0 usecs
[ 1528.578632]  drm_buddy(E) intel_soc_dts_iosf(E) dell_wmi_sysman(E) 
videobuf2_memops(E) btbcm(E) rapl(E) processor_thermal_device(E) uvc(E) 
iwlwifi(E)
[ 1528.578639] iTCO_wdt iTCO_wdt: PM: calling 
platform_pm_suspend+0x0/0x50 @ 70543, parent: 0000:00:1f.4
[ 1528.578641]  dell_smm_hwmon(E) ttm(E) videobuf2_v4l2(E) mxm_wmi(E)
[ 1528.578644] iTCO_wdt iTCO_wdt: PM: platform_pm_suspend+0x0/0x50 
returned 0 after 0 usecs
[ 1528.578646]  snd_timer(E) firmware_attributes_class(E) wmi_bmof(E) 
intel_cstate(E) btmtk(E) dell_wmi_descriptor(E) intel_wmi_thunderbolt(E) 
processor_thermal_wt_hint(E) processor_thermal_rfim(E) intel_uncore(E) 
psmouse(E) bluetooth(E) pcspkr(E) drm_display_helper(E) i2c_i801(E) snd(E)
[ 1528.578661] intel_rapl_msr intel_rapl_msr.0: PM: calling 
platform_pm_suspend+0x0/0x50 @ 70543, parent: platform
[ 1528.578663]  processor_thermal_rapl(E) video(E) videodev(E) 
drm_kms_helper(E) cfg80211(E) soundcore(E)
[ 1528.578667] intel_rapl_msr intel_rapl_msr.0: PM: 
platform_pm_suspend+0x0/0x50 returned 0 after 0 usecs
[ 1528.578670]  i2c_smbus(E) intel_rapl_common(E)
[ 1528.578667] i2c_hid_acpi i2c-WCOM490B:00: PM: calling 
acpi_subsys_suspend+0x0/0x60 @ 88, parent: i2c-1
[ 1528.578672]  intel_lpss_pci(E) videobuf2_common(E) cec(E) mei_me(E) 
processor_thermal_wt_req(E) intel_lpss(E) 
processor_thermal_power_floor(E) ecdh_generic(E) thunderbolt(E)
[ 1528.578679] idma64 idma64.0: PM: calling platform_pm_suspend+0x0/0x50 
@ 70543, parent: 0000:00:15.0
[ 1528.578683]  mc(E) cdc_acm(E) mei(E) rfkill(E) rc_core(E) idma64(E) 
processor_thermal_mbox(E) intel_pch_thermal(E) int3403_thermal(E) 
int340x_thermal_zone(E) dell_smo8800(E) wmi(E) button(E) intel_hid(E) 
evdev(E) battery(E) int3400_thermal(E) sparse_keymap(E) 
acpi_thermal_rel(E) acpi_pad(E) ac(E) parport_pc(E) ppdev(E) lp(E) 
parport(E) fuse(E) loop(E) efi_pstore(E) configfs(E) nfnetlink(E) 
ip_tables(E) x_tables(E) ext4(E) crc32c_generic(E) crc16(E) mbcache(E) 
jbd2(E) dm_crypt(E) nvme(E) rtsx_pci_sdmmc(E) xhci_pci(E) 
i2c_hid_acpi(E) nvme_core(E) i2c_hid(E) mmc_core(E) ahci(E) xhci_hcd(E) 
hid(E) t10_pi(E) libahci(E) crc64_rocksoft_generic(E) crc32_pclmul(E) 
ucsi_acpi(E) crc64_rocksoft(E) crc32c_intel(E) libata(E) typec_ucsi(E) 
crc_t10dif(E) ghash_clmulni_intel(E) crct10dif_generic(E) drm(E) 
roles(E) sha512_ssse3(E) usbcore(E) crct10dif_pclmul(E) sha256_ssse3(E) 
crc64(E) scsi_mod(E) sha1_ssse3(E) rtsx_pci(E) typec(E) 
crct10dif_common(E) scsi_common(E) usb_common(E) serio_raw(E) 
dm_mirror(E) dm_region_hash(E) dm_log(E)
[ 1528.578760]  dm_mod(E) msr(E) efivarfs(E) autofs4(E) aesni_intel(E) 
crypto_simd(E) cryptd(E)
[ 1528.578768] CPU: 1 PID: 92 Comm: kworker/u24:5 Tainted: G 
E      6.8.0-rc2 #9
[ 1528.578773] Hardware name: Dell Inc. XPS 15 7590/0VYV0G, BIOS 1.24.0 
09/11/2023
[ 1528.578775] Workqueue: events_unbound async_run_entry_fn
[ 1528.578783] RIP: 0010:_regulator_disable+0xbb/0x190
[ 1528.578789] Code: 56 c7 45 0c 00 00 00 00 eb a8 48 8b 85 a8 03 00 00 
48 85 c0 74 2a 48 8b 30 48 85 f6 74 22 48 c7 c7 6f a1 45 b9 e8 55 86 8b 
ff <0f> 0b 41 bc fb ff ff ff 5b 5d 44 89 e0 41 5c 41 5d c3 cc cc cc cc
[ 1528.578793] RSP: 0018:ffffa2a3403e3d48 EFLAGS: 00010282
[ 1528.578796] RAX: 0000000000000000 RBX: ffff8bd0456ee300 RCX: 
0000000000000027
[ 1528.578799] RDX: ffff8bd79a061708 RSI: 0000000000000001 RDI: 
ffff8bd79a061700
[ 1528.578801] RBP: ffff8bd041304000 R08: 0000000000000000 R09: 
ffff8bd8bc03adff
[ 1528.578803] R10: ffffffffffffffff R11: 20726f662073656c R12: 
ffffffffc10692c8
[ 1528.578805] R13: 0000000000000002 R14: ffffffffc10692a8 R15: 
0000000000000001
[ 1528.578808] FS:  0000000000000000(0000) GS:ffff8bd79a040000(0000) 
knlGS:0000000000000000
[ 1528.578811] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1528.578813] CR2: 000055742d2f3e06 CR3: 0000000466020004 CR4: 
00000000003706f0
[ 1528.578816] Call Trace:
[ 1528.578819]  <TASK>
[ 1528.578820]  ? _regulator_disable+0xbb/0x190
[ 1528.578825]  ? __warn+0x81/0x130
[ 1528.578832]  ? _regulator_disable+0xbb/0x190
[ 1528.578837]  ? report_bug+0x171/0x1a0
[ 1528.578847]  ? handle_bug+0x3c/0x80
[ 1528.578852]  ? exc_invalid_op+0x17/0x70
[ 1528.578856]  ? asm_exc_invalid_op+0x1a/0x20
[ 1528.578863]  ? _regulator_disable+0xbb/0x190
[ 1528.578869]  ? _regulator_disable+0xbb/0x190
[ 1528.578874]  regulator_bulk_disable+0x8e/0x180
[ 1528.578880]  ? __pfx_lis3lv02d_i2c_suspend+0x10/0x10 [lis3lv02d_i2c]
[ 1528.578890]  lis3lv02d_i2c_suspend+0x24/0x30 [lis3lv02d_i2c]
[ 1528.578898]  dpm_run_callback+0x89/0x1e0
[ 1528.578906]  __device_suspend+0xf1/0x4f0
[ 1528.578912]  async_suspend+0x1e/0x70
[ 1528.578918]  async_run_entry_fn+0x31/0x130
[ 1528.578924]  process_one_work+0x171/0x340
[ 1528.578930]  worker_thread+0x27b/0x3a0
[ 1528.578936]  ? __pfx_worker_thread+0x10/0x10
[ 1528.578940]  kthread+0xe5/0x120
[ 1528.578944]  ? __pfx_kthread+0x10/0x10
[ 1528.578948]  ret_from_fork+0x31/0x50
[ 1528.578952]  ? __pfx_kthread+0x10/0x10
[ 1528.578955]  ret_from_fork_asm+0x1b/0x30
[ 1528.578965]  </TASK>
[ 1528.578967] ---[ end trace 0000000000000000 ]---
[ 1528.578970] Failed to disable Vdd_IO: -EIO
[ 1528.578974] lis3lv02d_i2c 0-0029: PM: lis3lv02d_i2c_suspend+0x0/0x30 
[lis3lv02d_i2c] returned 0 after 1190 usecs
```

Unfortunately, this is out of my expertise, so any help is appreciated.


Kind regards,

Paul


[1]: https://git.kernel.org/linus/2f189493ae32be9768b27072c9388e62b38d2dda