Messages in this thread | | | From | "liuqi (BA)" <> | Subject | [ISSUE] WARNING in base/core.c when executing link reset of remote PHY and rmmod SAS driver simultaneously | Date | Sat, 30 Oct 2021 10:56:39 +0800 |
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Hi all,
I met a issue on v5.15-rc6, WARNING is triggered when executing link reset of remote PHY and rmmod SAS driver simultaneously. Here is the WARNING log:
WARNING: CPU: 61 PID: 21818 at drivers/base/core.c:1349 __device_links_no_driver+0xb4/0xc0 CPU: 61 PID: 21818 Comm: kworker/u256:4 Kdump: loaded Tainted: G W 5.15.0-rc5+ #25 Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V5.B170.01 06/30/2021 Workqueue: 0000:74:02.0_disco_q sas_revalidate_domain [libsas] pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __device_links_no_driver+0xb4/0xc0 lr : device_links_driver_cleanup+0xb0/0xfc sp : ffff800049e73b10 x29: ffff800049e73b10 x28: 0000000000000000 x27: 0000000000000000 x26: ffff00209ecd7428 x25: 0000000000000000 x24: ffff204002bc8000 x23: ffff00209ff53190 x22: ffff00209ff53190 x21: 0000000000000001 x20: ffff00209ff53230 x19: ffff00209ff53210 x18: 0000000000000030 x17: 74796274736f6820 x16: 3a746c7573655220 x15: 3a64656c69616620 x14: 2930312865686361 x13: 4b4f5f5245564952 x12: 443d657479627265 x11: 7669726420343078 x10: ffff0020913b0640 x9 : ffffccc6d592b514 x8 : ffff204002bc8a00 x7 : ffffffff80000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff00209ff53250 x2 : 0000000000000003 x1 : 000000000000004c x0 : ffff00209ee60c00 Call trace: __device_links_no_driver+0xb4/0xc0 device_links_driver_cleanup+0xb0/0xfc __device_release_driver+0x198/0x23c device_release_driver+0x38/0x50 bus_remove_device+0x130/0x140 device_del+0x184/0x434 __scsi_remove_device+0x118/0x150 scsi_remove_target+0x1bc/0x240 sas_rphy_remove+0x90/0x94 sas_rphy_delete+0x24/0x3c sas_destruct_devices+0x64/0xa0 [libsas] sas_revalidate_domain+0xe4/0x150 [libsas] process_one_work+0x1e0/0x46c worker_thread+0x15c/0x464 kthread+0x160/0x170 ret_from_fork+0x10/0x20 ---[ end trace 71e059eb58f85d4a ]---
Normally in __device_links_no_driver(), link->status is DL_STATE_SUPPLIER_UNBIND, but in the WARNING scenario, link->status is DL_STATE_ACTIVE.
I'm not sure this warning is caused by libsas, lldd or sas scsi transport code. Does anyone have any ideas?
Thanks, Qi
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