usb 3-1: USB disconnect, device number 81 ====================================================== WARNING: possible circular locking dependency detected 5.3.0-rc2+ #25 Not tainted ------------------------------------------------------ kworker/1:7/6472 is trying to acquire lock: 00000000c7296f7b (minor_rwsem#2){++++}, at: usb_deregister_dev drivers/usb/core/file.c:238 [inline] 00000000c7296f7b (minor_rwsem#2){++++}, at: usb_deregister_dev+0x61/0x270 drivers/usb/core/file.c:230 but task is already holding lock: 000000009cb46e35 (iowarrior_open_disc_lock){+.+.}, at: iowarrior_disconnect+0x45/0x2c0 drivers/usb/misc/iowarrior.c:867 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (iowarrior_open_disc_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:930 [inline] __mutex_lock+0x158/0x1360 kernel/locking/mutex.c:1077 iowarrior_open+0x8a/0x2a0 drivers/usb/misc/iowarrior.c:600 usb_open+0x1df/0x270 drivers/usb/core/file.c:48 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3416 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (iowarrior_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:930 [inline] __mutex_lock+0x158/0x1360 kernel/locking/mutex.c:1077 iowarrior_open+0x23/0x2a0 drivers/usb/misc/iowarrior.c:589 usb_open+0x1df/0x270 drivers/usb/core/file.c:48 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3416 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (minor_rwsem#2){++++}: check_prev_add kernel/locking/lockdep.c:2405 [inline] check_prevs_add kernel/locking/lockdep.c:2507 [inline] validate_chain kernel/locking/lockdep.c:2897 [inline] __lock_acquire+0x1f7c/0x3b50 kernel/locking/lockdep.c:3880 lock_acquire+0x127/0x320 kernel/locking/lockdep.c:4412 down_write+0x92/0x150 kernel/locking/rwsem.c:1500 usb_deregister_dev drivers/usb/core/file.c:238 [inline] usb_deregister_dev+0x61/0x270 drivers/usb/core/file.c:230 iowarrior_disconnect+0xa8/0x2c0 drivers/usb/misc/iowarrior.c:873 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1120 [inline] device_release_driver_internal+0x404/0x4c0 drivers/base/dd.c:1151 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556 device_del+0x420/0xb10 drivers/base/core.c:2288 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2199 hub_port_connect drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1454/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 other info that might help us debug this: Chain exists of: minor_rwsem#2 --> iowarrior_mutex --> iowarrior_open_disc_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(iowarrior_open_disc_lock); lock(iowarrior_mutex); lock(iowarrior_open_disc_lock); lock(minor_rwsem#2); *** DEADLOCK *** 6 locks held by kworker/1:7/6472: #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 00000000623dfb12 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240 #1: 000000009a2b0049 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244 #2: 000000008ca03ff6 (&dev->mutex){....}, at: device_lock include/linux/device.h:1220 [inline] #2: 000000008ca03ff6 (&dev->mutex){....}, at: hub_event+0x17c/0x3640 drivers/usb/core/hub.c:5387 #3: 0000000022e9bfb0 (&dev->mutex){....}, at: device_lock include/linux/device.h:1220 [inline] #3: 0000000022e9bfb0 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 drivers/usb/core/hub.c:2190 #4: 000000003f081688 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x4c0 drivers/base/dd.c:1148 #5: 000000009cb46e35 (iowarrior_open_disc_lock){+.+.}, at: iowarrior_disconnect+0x45/0x2c0 drivers/usb/misc/iowarrior.c:867 stack backtrace: CPU: 1 PID: 6472 Comm: kworker/1:7 Not tainted 5.3.0-rc2+ #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 check_noncircular+0x345/0x3e0 kernel/locking/lockdep.c:1741 check_prev_add kernel/locking/lockdep.c:2405 [inline] check_prevs_add kernel/locking/lockdep.c:2507 [inline] validate_chain kernel/locking/lockdep.c:2897 [inline] __lock_acquire+0x1f7c/0x3b50 kernel/locking/lockdep.c:3880 lock_acquire+0x127/0x320 kernel/locking/lockdep.c:4412 down_write+0x92/0x150 kernel/locking/rwsem.c:1500 usb_deregister_dev drivers/usb/core/file.c:238 [inline] usb_deregister_dev+0x61/0x270 drivers/usb/core/file.c:230 iowarrior_disconnect+0xa8/0x2c0 drivers/usb/misc/iowarrior.c:873 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1120 [inline] device_release_driver_internal+0x404/0x4c0 drivers/base/dd.c:1151 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556 device_del+0x420/0xb10 drivers/base/core.c:2288 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2199 hub_port_connect drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1454/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 iowarrior 3-1:0.236: I/O-Warror #0 now disconnected usb 3-1: new high-speed USB device number 82 using dummy_hcd usb 3-1: config 0 has an invalid interface number: 141 but max is 0 usb 3-1: config 0 has no interface number 0 usb 3-1: New USB device found, idVendor=0b48, idProduct=300a, bcdDevice=58.97 usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 3-1: config 0 descriptor?? dvb-usb: found a 'Technotrend TT Connect S2-3650-CI' in warm state. pctv452e: pctv452e_power_ctrl: 1 pctv452e: pctv452e_power_ctrl: Warning set interface returned: -22 dvb-usb: bulk message failed: -22 (5/0) dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. dvbdev: DVB: registering new adapter (Technotrend TT Connect S2-3650-CI) usb 3-1: media controller created dvb-usb: bulk message failed: -22 (8/0) pctv452e: I2C error -22; AA 01 A0 01 14 -> aa 01 31 04 a0 01 14 dvb-usb: MAC address reading failed. dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. dvb-usb: bulk message failed: -22 (10/0) pctv452e: I2C error -22; AA 02 D0 03 00 -> aa 02 31 06 d0 03 00 dvb-usb: bulk message failed: -22 (9/0) pctv452e: I2C error -22; AA 03 D0 02 00 -> aa 03 31 05 d0 02 00 dvb-usb: bulk message failed: -22 (13/0) pctv452e: I2C error -22; AA 04 D0 06 00 -> aa 04 31 09 d0 06 00 _stb0899_read_s2reg ERR(1), Device=[0xf3fc], Base address=[0x00000400], Offset=[0xf334], Status=0 dvb-usb: bulk message failed: -22 (13/0) pctv452e: I2C error -22; AA 05 D0 06 00 -> aa 05 31 09 d0 06 00 _stb0899_read_s2reg ERR(1), Device=[0xf3fc], Base address=[0x00000400], Offset=[0xf33c], Status=0 dvb-usb: bulk message failed: -22 (13/0) pctv452e: I2C error -22; AA 06 D0 06 00 -> aa 06 31 09 d0 06 00 _stb0899_read_s2reg ERR(1), Device=[0xfafc], Base address=[0x00000800], Offset=[0xfa2c], Status=0 dvb-usb: bulk message failed: -22 (13/0) pctv452e: I2C error -22; AA 07 D0 06 00 -> aa 07 31 09 d0 06 00 _stb0899_read_s2reg ERR(1), Device=[0xfafc], Base address=[0x00000800], Offset=[0xfa34], Status=0 stb0899_attach: Attaching STB0899 dvb-usb: bulk message failed: -22 (11/0) pctv452e: I2C error -22; AA 08 10 04 00 -> aa 08 31 07 10 04 00 lnbp22_attach LNBP22 not found pctv452e: Cannot attach lnbp22 dvbdev: dvb_create_media_entity: media entity 'dvb-ca-en50221' registered. pctv452e: CI initialized. usb 3-1: DVB: registering adapter 0 frontend 0 (STB0899 Multistandard)... dvbdev: dvb_create_media_entity: media entity 'STB0899 Multistandard' registered. stb6100_attach: Attaching STB6100 Registered IR keymap rc-tt-1500 rc rc0: Technotrend TT Connect S2-3650-CI as /devices/platform/dummy_hcd.2/usb3/3-1/rc/rc0 input: Technotrend TT Connect S2-3650-CI as /devices/platform/dummy_hcd.2/usb3/3-1/rc/rc0/input127 dvb-usb: schedule remote query interval to 100 msecs. pctv452e: pctv452e_power_ctrl: 0 dvb-usb: Technotrend TT Connect S2-3650-CI successfully initialized and connected. usb 3-1: USB disconnect, device number 82 dvb-usb: bulk message failed: -22 (5/0) pctv452e: CI error -22; AA 09 46 -> aa 09 46. dvb-usb: bulk message failed: -22 (5/0) pctv452e: CI error -22; AA 0A 46 -> aa 0a 46. dvb-usb: bulk message failed: -22 (10/0) pctv452e: I2C error -22; AA 0B D0 03 00 -> aa 0b 31 06 d0 03 00 dvb-usb: Technotrend TT Connect S2-3650-CI successfully deinitialized and disconnected. usb 3-1: new high-speed USB device number 83 using dummy_hcd usb 3-1: Using ep0 maxpacket: 8 usb 3-1: config index 0 descriptor too short (expected 9, got 0) usb 3-1: can't read configurations, error -22 usb 3-1: new high-speed USB device number 84 using dummy_hcd usb 3-1: Using ep0 maxpacket: 8 usb 3-1: config 1 has an invalid interface number: 31 but max is 0 usb 3-1: config 1 has no interface number 0 usb 3-1: config 1 interface 31 altsetting 6 bulk endpoint 0x1 has invalid maxpacket 40 usb 3-1: config 1 interface 31 altsetting 6 bulk endpoint 0x82 has invalid maxpacket 64 usb 3-1: config 1 interface 31 altsetting 6 has 2 endpoint descriptors, different from the interface descriptor's value: 18 usb 3-1: config 1 interface 31 has no altsetting 0 usb 3-1: New USB device found, idVendor=03f0, idProduct=6c17, bcdDevice= 0.40 usb 3-1: New USB device strings: Mfr=5, Product=7, SerialNumber=2 usb 3-1: Product: Ⰱҫ usb 3-1: SerialNumber: Ⰱ걼ᐥ㙚牭ꉨ⃥駡顋⧜段䔷Ӭ־诫ඉ㣔킜櫯潿鄒컃邸炰컠荄嘹춣ۉ䁐ꄻ䇻㹡춁圄飂⁵偡‼冺澁柨靁橳䍌棷ӭ㴛빓ﰹ㚸뻅ᗚ뻕赹뇘嗳꜓㍤낍೉榚㎋蕋Ⴕ瑐䗸楪汥襖԰腍๩帺ো⿮碌リ䆈ᱦ㫣욏邺䤶핚ꤌ㲪眦๑櫱韮뻤┠悞呮㤡뷣쒥䛵魆㕙嶶 usblp: can't set desired altsetting 6 on interface 31 usb 3-1: USB disconnect, device number 84 usb 6-1: new high-speed USB device number 88 using dummy_hcd usb 6-1: device descriptor read/64, error 18