Oh hai!
I have LSI SAS 9217-8i HBA and `rmmod mpt3sas` leads to multiple
backtraces if any disks are connected to the HBA.
Reproducible on vanilla 4.7.5/4.8.1/4.9-rc1 kernels (haven't tested on
another versions).
Full output (4.9-rc1 kernel, 3*Seagate ST3000NM0023 drives are
connected) is rather long and can be found here:
https://gist.github.com/ojab/f21ff778a378e88b227a4253d683c6ca
First backtrace for the reference:
Oct 16 13:12:30 ojab kernel: [ 88.128184] mpt3sas version 13.100.00.00
unloading
Oct 16 13:12:30 ojab kernel: [ 88.128838] mpt2sas_cm0: removing
handle(0x000b), sas_addr(0x5000c500588f549d)
Oct 16 13:12:30 ojab kernel: [ 88.128976] mpt2sas_cm0: removing :
enclosure logical id(0x500605b005a6c320), slot(4)
Oct 16 13:12:30 ojab kernel: [ 88.130608] mpt2sas_cm0: removing
handle(0x0009), sas_addr(0x5000c500588f64e9)
Oct 16 13:12:30 ojab kernel: [ 88.130720] mpt2sas_cm0: removing :
enclosure logical id(0x500605b005a6c320), slot(6)
Oct 16 13:12:30 ojab kernel: [ 88.131416] mpt2sas_cm0: removing
handle(0x000a), sas_addr(0x5000c500588f3825)
Oct 16 13:12:30 ojab kernel: [ 88.131518] mpt2sas_cm0: removing :
enclosure logical id(0x500605b005a6c320), slot(5)
Oct 16 13:12:30 ojab kernel: [ 88.132637] ------------[ cut here
]------------
Oct 16 13:12:30 ojab kernel: [ 88.132715] WARNING: CPU: 2 PID: 1578 at
fs/sysfs/group.c:237 sysfs_remove_group+0xa0/0xb0
Oct 16 13:12:30 ojab kernel: [ 88.132810] sysfs group 'power' not
found for kobject '6:0:0:0'
Oct 16 13:12:30 ojab kernel: [ 88.132875] Modules linked in: sit
tunnel4 ip_tunnel af_packet bridge stp ipv6 llc ipt_MASQUERADE
nf_nat_masquerade_ipv4 xt_REDIRECT nf_nat_redirect xt_tcpudp
xt_conntrack iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4
nf_nat nf_\
conntrack iptable_filter ip_tables x_tables sch_fq_codel joydev
input_leds hid_generic usbhid hid btrfs xor raid6_pq pps_ldisc pps_core
radeon evdev edac_core arc4 drm_kms_helper syscopyarea sysfillrect
sysimgblt fb_sys_fops ath9k kvm_amd ttm ath9k_common kvm ath9k_hw dr\
m snd_hda_codec_realtek mac80211 snd_hda_codec_generic irqbypass psmouse
k10temp ohci_pci ath cfg80211 backlight 8250 snd_hda_intel 8250_base
serial_core rtc_cmos ehci_pci ehci_hcd snd_hda_codec snd_hwdep
snd_hda_core cfbfillrect snd_pcm i2c_piix4 cfbimgblt ohci_hcd mpt3\
sas(-) cfbcopyarea i2c_algo_bit
Oct 16 13:12:30 ojab kernel: [ 88.135640] usbcore snd_timer snd
i2c_core soundcore usb_common r8169 acpi_cpufreq raid_class mii
scsi_transport_sas button processor unix f71882fg hwmon fbcon bitblit
softcursor fb fbdev font
Oct 16 13:12:30 ojab kernel: [ 88.136514] CPU: 2 PID: 1578 Comm: rmmod
Not tainted 4.9.0-rc1-ojab #40
Oct 16 13:12:30 ojab kernel: [ 88.136581] ffffac8a02f03c10
ffffffff832e71a0 ffffac8a02f03c60 0000000000000000
Oct 16 13:12:30 ojab kernel: [ 88.136792] ffffac8a02f03c50
ffffffff83049fb3 000000ed8321922f 0000000000000000
Oct 16 13:12:30 ojab kernel: [ 88.137014] ffffffff838a2840
ffffa0dd15602410 ffffa0dd15400f88 ffffa0dd15400fd8
Oct 16 13:12:30 ojab kernel: [ 88.137223] Call Trace:
Oct 16 13:12:30 ojab kernel: [ 88.137294] [<ffffffff832e71a0>]
dump_stack+0x67/0x97
Oct 16 13:12:30 ojab kernel: [ 88.137360] [<ffffffff83049fb3>]
__warn+0xe3/0x100
Oct 16 13:12:30 ojab kernel: [ 88.137425] [<ffffffff8304a01f>]
warn_slowpath_fmt+0x4f/0x60
Oct 16 13:12:30 ojab kernel: [ 88.137492] [<ffffffff8321a09d>] ?
kernfs_find_and_get_ns+0x4d/0x60
Oct 16 13:12:30 ojab kernel: [ 88.137558] [<ffffffff8321d2a0>]
sysfs_remove_group+0xa0/0xb0
Oct 16 13:12:30 ojab kernel: [ 88.137625] [<ffffffff833aad40>]
dpm_sysfs_remove+0x60/0x70
Oct 16 13:12:30 ojab kernel: [ 88.137691] [<ffffffff8339f539>]
device_del+0x49/0x250
Oct 16 13:12:30 ojab kernel: [ 88.137756] [<ffffffff8339f752>]
device_unregister+0x12/0x30
Oct 16 13:12:30 ojab kernel: [ 88.137825] [<ffffffff832d82de>]
bsg_unregister_queue+0x5e/0xa0
Oct 16 13:12:30 ojab kernel: [ 88.137893] [<ffffffff833cd2ba>]
__scsi_remove_device+0xaa/0xd0
Oct 16 13:12:30 ojab kernel: [ 88.137969] [<ffffffff833cb760>]
scsi_forget_host+0x60/0x70
Oct 16 13:12:30 ojab kernel: [ 88.138035] [<ffffffff833c0c37>]
scsi_remove_host+0x77/0x110
Oct 16 13:12:30 ojab kernel: [ 88.138116] [<ffffffffc02323c9>]
scsih_remove+0x139/0x220 [mpt3sas]
Oct 16 13:12:30 ojab kernel: [ 88.138184] [<ffffffff8331e764>]
pci_device_remove+0x44/0xd0
Oct 16 13:12:30 ojab kernel: [ 88.138251] [<ffffffff833a3efa>]
__device_release_driver+0x9a/0x140
Oct 16 13:12:30 ojab kernel: [ 88.138318] [<ffffffff833a40a6>]
driver_detach+0xa6/0xb0
Oct 16 13:12:30 ojab kernel: [ 88.138384] [<ffffffff833a2d9c>]
bus_remove_driver+0x4c/0xa0
Oct 16 13:12:30 ojab kernel: [ 88.138450] [<ffffffff833a423c>]
driver_unregister+0x2c/0x50
Oct 16 13:12:30 ojab kernel: [ 88.138516] [<ffffffff8331e243>]
pci_unregister_driver+0x23/0x90
Oct 16 13:12:30 ojab kernel: [ 88.138594] [<ffffffffc0241a2b>]
_mpt3sas_exit+0x25/0x38 [mpt3sas]
Oct 16 13:12:30 ojab kernel: [ 88.138660] [<ffffffff830c1ec1>]
SyS_delete_module+0x181/0x1e0
Oct 16 13:12:30 ojab kernel: [ 88.138728] [<ffffffff834d8c6a>]
entry_SYSCALL_64_fastpath+0x18/0xa8
Oct 16 13:12:30 ojab kernel: [ 88.138811] ---[ end trace
4bd02fa3ee990966 ]---
//wbr ojab
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