pvrusb2: ***WARNING*** pvrusb2 driver initialization failed due to the failure of one or more sub-device kernel modules.
pvrusb2: You need to resolve the failing condition before this driver can function.  There should be some earlier messages giving more information about the problem.
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sysfs group 'power' not found for kobject '1-0043'
WARNING: CPU: 0 PID: 3951 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Modules linked in:
CPU: 0 PID: 3951 Comm: pvrusb2-context Not tainted 5.12.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 c7 96 cb ff 49 8b 14 24 48 c7 c7 80 18 c2 89 4c 89 f6 31 c0 e8 72 94 56 ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 e0 af 87 ff 49 8d 5e 20
RSP: 0018:ffffc9000325fc08 EFLAGS: 00010246
RAX: f6acbc5099e88b00 RBX: ffff88801f1a2050 RCX: ffff88801dc50000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1459be0 R08: ffffffff8160b612 R09: ffffed1017385fe8
R10: ffffed1017385fe8 R11: 0000000000000000 R12: ffff88801f1a2020
R13: dffffc0000000000 R14: ffffffff8a2cdec0 R15: ffff888025b122b8
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff67f39008 CR3: 000000000c48e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_del+0x26a/0xa90 drivers/base/core.c:3398
 device_unregister+0x1a/0xc0 drivers/base/core.c:3454
 i2c_unregister_device drivers/i2c/i2c-core-base.c:963 [inline]
 __unregister_client+0x15b/0x180 drivers/i2c/i2c-core-base.c:1606
 device_for_each_child+0x9c/0x100 drivers/base/core.c:3554
 i2c_del_adapter+0x234/0x7f0 drivers/i2c/i2c-core-base.c:1669
 pvr2_i2c_core_done+0x55/0xb0 drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:652
 pvr2_hdw_destroy+0x150/0x2b0 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2679
 pvr2_context_destroy+0x7a/0x3c0 drivers/media/usb/pvrusb2/pvrusb2-context.c:70
 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline]
 pvr2_context_thread_func+0x3dd/0xa90 drivers/media/usb/pvrusb2/pvrusb2-context.c:158
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294