WARNING: CPU: 2 PID: 11303 at drivers/scsi/scsi_lib.c:2600 scsi_device_resume+0x4f/0x58

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Greetings,

recently, after resume from hibernation I'm getting a strange warning in my 
dmesg output.

The whole process (hibernate/resume) triggers WARN_ON_ONCE at line 2600 in 
scsi_lib.c file.

It is a Lenovo g50-45 netbook with sata ssd (micron 1100) and amd fch ahci 
piix4 (1022:7801) sata controller. Scheduler is bfq.

Here is the WARNING part from machine's log:



[   95.680910] WARNING: CPU: 2 PID: 11303 at drivers/scsi/scsi_lib.c:2600 
scsi_device_resume+0x4f/0x58
[   95.680912] Modules linked in: rfcomm nf_tables ebtable_nat ip_set 
nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables overlay squashfs 
loop bnep ipv6 ath3k btusb btintel bluetooth ecdh_generic rtsx_usb_sdmmc 
rtsx_usb_ms memstick rtsx_usb uvcvideo videobuf2_vmalloc videobuf2_memops 
videobuf2_v4l2 videobuf2_common videodev media kvm_amd ath9k ath9k_common 
ath9k_hw kvm sdhci_pci cqhci irqbypass crc32_pclmul sdhci mac80211 
ghash_clmulni_intel serio_raw mmc_core ath sp5100_tco amdgpu xhci_pci ehci_pci 
ehci_hcd mfd_core cfg80211 chash xhci_hcd gpu_sched ttm
[   95.680959] CPU: 2 PID: 11303 Comm: kworker/u8:70 Not tainted 5.0.0-rc1+ 
#50
[   95.680961] Hardware name: LENOVO 80E3/Lancer 5B2, BIOS A2CN45WW(V2.13) 
08/04/2016
[   95.680966] Workqueue: events_unbound async_run_entry_fn
[   95.680971] RIP: 0010:scsi_device_resume+0x4f/0x58
[   95.680974] Code: 00 00 00 00 48 8b 7b 08 e8 96 33 e6 ff 83 bb d0 07 00 00 
05 75 0a c7 83 d0 07 00 00 02 00 00 00 48 89 ef 5b 5d e9 d9 71 25 00 <0f> 0b 
eb cb 0f 1f 44 00 00 eb a6 66 0f 1f 44 00 00 48 c7 c2 80 51
[   95.680976] RSP: 0018:ffffba5482167e50 EFLAGS: 00010246
[   95.680979] RAX: 0000000000000000 RBX: ffff9dff5610c800 RCX: 0000000000000000
[   95.680980] RDX: ffff9dfef2dfc240 RSI: ffffffffaae8abc0 RDI: ffff9dff5610cfb0
[   95.680982] RBP: ffff9dff5610cfb0 R08: 0000000000000008 R09: 0000646e756f626e
[   95.680984] R10: 8080808080808080 R11: 0000000000000010 R12: ffff9dff56816000
[   95.680986] R13: 0000000000000000 R14: ffff9dff276736c0 R15: 0ffff9dff5681600
[   95.680988] FS:  0000000000000000(0000) GS:ffff9dff57b00000(0000) knlGS:
0000000000000000
[   95.680990] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   95.680992] CR2: 0000000000000000 CR3: 00000001dfc0e000 CR4: 
00000000000406e0
[   95.680993] Call Trace:
[   95.681003]  scsi_dev_type_resume+0x2e/0x60
[   95.681007]  async_run_entry_fn+0x32/0xd8
[   95.681012]  process_one_work+0x1f4/0x420
[   95.681016]  worker_thread+0x28/0x3c0
[   95.681020]  ? rescuer_thread+0x330/0x330
[   95.681023]  kthread+0x118/0x130
[   95.681027]  ? kthread_create_on_node+0x60/0x60
[   95.681033]  ret_from_fork+0x22/0x40
[   95.681038] ---[ end trace c27b17349dc21611 ]---


Any help is appreciated.

Thanks,
Przemek.

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