Marcel Holtmann wrote:
Hi Brian,
Kay, David, wouldn't be pinning of the parent device here be enough to
get this done in a clean way?
If there's a way that the connection can be pinned until the child
devices go away, that definitely sounds cleaner to me.
so I pushed some patches to bluetooth-testing tree that should fix this
problem. They are not fully tested by me. Please test and report back
the results.
Fails to compile if CONFIG_USB_HIDDEV=y :
ERROR: "hiddev_disconnect" [net/bluetooth/hidp/hidp.ko] undefined!
Ironically, the reference to hiddev_disconnect is fine if hiddev isn't
enabled because then hiddev.h supplies an empty static inline function.
I'm going to test with a kernel without hiddev for now.
just take that piece out of the patch. It is not important. I just wanna
now if the uevents are now coming in order.
I just tried it without hiddev and observed that the input devices go
away, but the connection never gets deleted. Then when I turn my mouse
back on, bad stuff happens:
[ 281.027907] WARNING: at fs/sysfs/dir.c:487 sysfs_add_one+0x82/0x95()
[ 281.027913] Hardware name:
N/A
[ 281.027918] sysfs: cannot create duplicate filename
'/devices/pci0000:00/0000:00:1a.1/usb2/2-1/2-1:1.0/bluetooth/hci0/hci0:11'
[ 281.027924] Modules linked in: hidp hid aes_x86_64 aes_generic
ecryptfs cpufreq_ondemand af_packet binfmt_misc ipt_MASQUERADE
iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state
nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables
rfcomm bridge stp llc bnep sco l2cap kvm_intel kvm ipv6 container sbs
sbshc microcode acpi_cpufreq freq_table uinput sbp2 snd_hda_codec_si3054
snd_hda_codec_realtek snd_hda_intel snd_hda_codec joydev snd_hwdep arc4
snd_pcm btusb ecb bluetooth snd_seq_midi iwl3945 snd_rawmidi iwlcore
snd_seq_midi_event snd_seq snd_timer sr_mod mac80211 cdrom
snd_seq_device led_class ata_generic ohci1394 tg3 pata_acpi cfg80211
ehci_hcd uhci_hcd libphy snd ieee1394 ac ata_piix evdev usbcore rfkill
soundcore sg psmouse wmi snd_page_alloc battery button pcspkr processor
serio_raw sd_mod thermal fan fuse dm_mirror dm_region_hash dm_log dm_mod
ahci libata scsi_mod ext4 mbcache jbd2 crc16
[ 281.028108] Pid: 1765, comm: bluetooth Not tainted 2.6.31-rc4-red #4
[ 281.028113] Call Trace:
[ 281.028125] [<ffffffff8103526b>] ? warn_slowpath_common+0x76/0x8c
[ 281.028134] [<ffffffff810352d3>] ? warn_slowpath_fmt+0x40/0x45
[ 281.028142] [<ffffffff810e5169>] ? sysfs_add_one+0x82/0x95
[ 281.028150] [<ffffffff810e5730>] ? create_dir+0x4f/0x89
[ 281.028178] [<ffffffffa02e075e>] ? add_conn+0x0/0xca [bluetooth]
[ 281.028186] [<ffffffff810e579f>] ? sysfs_create_dir+0x35/0x46
[ 281.028195] [<ffffffff811243d9>] ? kobject_get+0x12/0x17
[ 281.028203] [<ffffffff81124526>] ? kobject_add_internal+0xcd/0x186
[ 281.028226] [<ffffffffa02e075e>] ? add_conn+0x0/0xca [bluetooth]
[ 281.028235] [<ffffffff8112476f>] ? kobject_add+0x66/0x6b
[ 281.028244] [<ffffffff811c9f85>] ? device_add+0xcd/0x4ec
[ 281.028296] [<ffffffffa02e075e>] ? add_conn+0x0/0xca [bluetooth]
[ 281.028318] [<ffffffffa02e0793>] ? add_conn+0x35/0xca [bluetooth]
[ 281.028329] [<ffffffff81043e40>] ? worker_thread+0x146/0x1ea
[ 281.028338] [<ffffffff810476a3>] ? autoremove_wake_function+0x0/0x2a
[ 281.028346] [<ffffffff81043cfa>] ? worker_thread+0x0/0x1ea
[ 281.028354] [<ffffffff810473ba>] ? kthread+0x80/0x88
[ 281.028365] [<ffffffff8100c96a>] ? child_rip+0xa/0x20
[ 281.028373] [<ffffffff8104733a>] ? kthread+0x0/0x88
[ 281.028381] [<ffffffff8100c960>] ? child_rip+0x0/0x20
[ 281.028387] ---[ end trace de74c554ac3186bd ]---
[ 281.028396] kobject_add_internal failed for hci0:11 with -EEXIST,
don't try to register things with the same name in the same directory.
[ 281.028572] Pid: 1765, comm: bluetooth Tainted: G W
2.6.31-rc4-red #4
[ 281.028577] Call Trace:
[ 281.028585] [<ffffffff811245b5>] ? kobject_add_internal+0x15c/0x186
[ 281.028608] [<ffffffffa02e075e>] ? add_conn+0x0/0xca [bluetooth]
[ 281.028616] [<ffffffff8112476f>] ? kobject_add+0x66/0x6b
[ 281.028624] [<ffffffff811c9f85>] ? device_add+0xcd/0x4ec
[ 281.028646] [<ffffffffa02e075e>] ? add_conn+0x0/0xca [bluetooth]
[ 281.028667] [<ffffffffa02e0793>] ? add_conn+0x35/0xca [bluetooth]
[ 281.028676] [<ffffffff81043e40>] ? worker_thread+0x146/0x1ea
[ 281.028684] [<ffffffff810476a3>] ? autoremove_wake_function+0x0/0x2a
[ 281.028693] [<ffffffff81043cfa>] ? worker_thread+0x0/0x1ea
[ 281.028700] [<ffffffff810473ba>] ? kthread+0x80/0x88
[ 281.028709] [<ffffffff8100c96a>] ? child_rip+0xa/0x20
[ 281.028717] [<ffffffff8104733a>] ? kthread+0x0/0x88
[ 281.028724] [<ffffffff8100c960>] ? child_rip+0x0/0x20
[ 281.028730] add_conn: Failed to register connection device
[ 281.136405] BUG: unable to handle kernel NULL pointer dereference at
0000000000000038
[ 281.136545] IP: [<ffffffff810e51a0>] sysfs_addrm_start+0x24/0xa0
[ 281.136648] PGD 0
[ 281.136692] Oops: 0000 [#1] PREEMPT SMP
[ 281.136781] last sysfs file:
/sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:22/ACPI0003:00/power_supply/ACAD/online
[ 281.136927] CPU 0
[ 281.136970] Modules linked in: hidp hid aes_x86_64 aes_generic
ecryptfs cpufreq_ondemand af_packet binfmt_misc ipt_MASQUERADE
iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state
nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables
rfcomm bridge stp llc bnep sco l2cap kvm_intel kvm ipv6 container sbs
sbshc microcode acpi_cpufreq freq_table uinput sbp2 snd_hda_codec_si3054
snd_hda_codec_realtek snd_hda_intel snd_hda_codec joydev snd_hwdep arc4
snd_pcm btusb ecb bluetooth snd_seq_midi iwl3945 snd_rawmidi iwlcore
snd_seq_midi_event snd_seq snd_timer sr_mod mac80211 cdrom
snd_seq_device led_class ata_generic ohci1394 tg3 pata_acpi cfg80211
ehci_hcd uhci_hcd libphy snd ieee1394 ac ata_piix evdev usbcore rfkill
soundcore sg psmouse wmi snd_page_alloc battery button pcspkr processor
serio_raw sd_mod thermal fan fuse dm_mirror dm_region_hash dm_log dm_mod
ahci libata scsi_mod ext4 mbcache jbd2 crc16
[ 281.137011] Pid: 3226, comm: bluetoothd Tainted: G W
2.6.31-rc4-red #4 N/A
[ 281.137011] RIP: 0010:[<ffffffff810e51a0>] [<ffffffff810e51a0>]
sysfs_addrm_start+0x24/0xa0
[ 281.137011] RSP: 0018:ffff88013887bab8 EFLAGS: 00010286
[ 281.137011] RAX: 0000000000000000 RBX: ffff88013887bad8 RCX:
0000000000000000
[ 281.137011] RDX: 0000000000003d37 RSI: 0000000000000000 RDI:
ffffffff813e5660
[ 281.137011] RBP: 0000000000000000 R08: 0000000000000100 R09:
ffff8801389adaa8
[ 281.137011] R10: ffff880133e2dc00 R11: 0000000000000002 R12:
ffff88013887bb30
[ 281.137011] R13: ffff880131652370 R14: 00000000fffffff4 R15:
ffff88013887bc68
[ 281.137011] FS: 00007fc38fb106f0(0000) GS:ffff880028022000(0000)
knlGS:0000000000000000
[ 281.137011] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 281.137011] CR2: 0000000000000038 CR3: 000000013cf60000 CR4:
00000000000026f0
[ 281.137011] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 281.137011] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 281.137011] Process bluetoothd (pid: 3226, threadinfo
ffff88013887a000, task ffff88013d5deb50)
[ 281.137011] Stack:
[ 281.137011] 00000000ffffffea 0000000000000000 ffff8801388c3898
ffffffff810e5725
[ 281.137011] <0> 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 281.137011] <0> ffff8801388c3898 ffff8801388c3898 ffff880138ad7560
00000000ffffffea
[ 281.137011] Call Trace:
[ 281.219723] [<ffffffff810e5725>] ? create_dir+0x44/0x89
[ 281.219723] [<ffffffff810e579f>] ? sysfs_create_dir+0x35/0x46
[ 281.219723] [<ffffffff811243d9>] ? kobject_get+0x12/0x17
[ 281.219723] [<ffffffff81124526>] ? kobject_add_internal+0xcd/0x186
[ 281.219723] [<ffffffff8112476f>] ? kobject_add+0x66/0x6b
[ 281.219723] [<ffffffff811c9f85>] ? device_add+0xcd/0x4ec
[ 281.219723] [<ffffffffa04fce02>] ? hid_add_device+0x13d/0x154 [hid]
[ 281.219723] [<ffffffffa050d27f>] ? hidp_add_connection+0x2af/0x58c
[hidp]
[ 281.219723] [<ffffffffa050d78f>] ? hidp_sock_ioctl+0xf2/0x22e [hidp]
[ 281.219723] [<ffffffff81075304>] ? mark_page_accessed+0x23/0x33
[ 281.219723] [<ffffffff811f532f>] ? sock_ioctl+0x1e7/0x208
[ 281.219723] [<ffffffff810a22d4>] ? vfs_ioctl+0x19/0x83
[ 281.219723] [<ffffffff810a5ab4>] ? d_instantiate+0x3d/0x4b
[ 281.219723] [<ffffffff810a27db>] ? do_vfs_ioctl+0x42b/0x46f
[ 281.219723] [<ffffffff811f59fe>] ? sock_attach_fd+0x95/0xc0
[ 281.219723] [<ffffffff8109474b>] ? fd_install+0x31/0x5c
[ 281.219723] [<ffffffff810a286a>] ? sys_ioctl+0x4b/0x6f
[ 281.219723] [<ffffffff8100b9ab>] ? system_call_fastpath+0x16/0x1b
[ 281.219723] Code: 5b 5d 41 5c 41 5d c3 55 31 c0 53 48 89 f5 48 83 ec
08 48 89 fb b9 08 00 00 00 f3 ab 48 89 33 48 c7 c7 60 56 3e 81 e8 50 6a
19 00 <48> 8b 75 38 48 89 e9 48 c7 c2 fc 4c 0e 81 48 8b 3d 13 49 40 00
[ 281.219723] RIP [<ffffffff810e51a0>] sysfs_addrm_start+0x24/0xa0
[ 281.219723] RSP <ffff88013887bab8>
[ 281.219723] CR2: 0000000000000038
[ 281.315613] ---[ end trace de74c554ac3186be ]---
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