On Wed, 11 Aug 2010, Alan Ott wrote: > Hello, > > I'm having a bit of trouble with hidraw (with a USB device) and device > removal. When I remove a device and re-attach it, the original device does not > get removed, and another node is added to /dev. > > At boot: > no /dev/hidraw devices exist > > attach a device: > /dev/hidraw0 exists > > detach the device: > /dev/hidraw0 remains > > re-attach the device: > /dev/hidraw0 exists (defunct) > /dev/hidraw1 exists > > This is with 2.6.35+ from git, revision 3d30701b58970425e1d, updated about 30 > minutes ago. > > Aug 11 11:04:15 ato kernel: [ 109.554287] ------------[ cut here > ]------------ > Aug 11 11:04:15 ato kernel: [ 109.554300] WARNING: at lib/kobject.c:595 > kobject_put+0x50/0x60() > Aug 11 11:04:15 ato kernel: [ 109.554306] Hardware name: GA-MA770T-UD3P > Aug 11 11:04:15 ato kernel: [ 109.554311] kobject: '(null)' > (ffff880244a49898): is not initialized, yet kobject_put() is being called. > Aug 11 11:04:15 ato kernel: [ 109.554317] Modules linked in: usbhid hid > binfmt_misc fbcon tileblit font bitblit softcursor snd_hda_codec_nvhdmi > nouveau snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep > snd_pcm_oss ttm drm_kms_helper snd_mixer_oss snd_pcm drm snd_seq_dummy > snd_seq_oss snd_seq_midi snd_rawmidi ppdev parport_pc snd_seq_midi_event > snd_seq psmouse lp snd_timer parport i2c_algo_bit edac_core video edac_mce_amd > i2c_piix4 snd_seq_device serio_raw snd soundcore snd_page_alloc output > ohci1394 floppy pata_atiixp ieee1394 ahci libahci r8169 mii > Aug 11 11:04:15 ato kernel: [ 109.554399] Pid: 29, comm: khubd Not tainted > 2.6.35+ #19 > Aug 11 11:04:15 ato kernel: [ 109.554404] Call Trace: > Aug 11 11:04:15 ato kernel: [ 109.554416] [<ffffffff8105de1f>] > warn_slowpath_common+0x7f/0xc0 > Aug 11 11:04:15 ato kernel: [ 109.554425] [<ffffffff8105df16>] > warn_slowpath_fmt+0x46/0x50 > Aug 11 11:04:15 ato kernel: [ 109.554434] [<ffffffff812a47c0>] > kobject_put+0x50/0x60 > Aug 11 11:04:15 ato kernel: [ 109.554442] [<ffffffff8135c6b7>] > put_device+0x17/0x20 > Aug 11 11:04:15 ato kernel: [ 109.554455] [<ffffffffa0238998>] > hid_destroy_device+0x48/0x60 [hid] > Aug 11 11:04:15 ato kernel: [ 109.554466] [<ffffffffa00f2aeb>] > usbhid_disconnect+0x2b/0x50 [usbhid] > Aug 11 11:04:15 ato kernel: [ 109.554477] [<ffffffff813d620a>] > usb_unbind_interface+0x5a/0x1a0 > Aug 11 11:04:15 ato kernel: [ 109.554487] [<ffffffff81360645>] > __device_release_driver+0x75/0xe0 > Aug 11 11:04:15 ato kernel: [ 109.554495] [<ffffffff813607ad>] > device_release_driver+0x2d/0x40 > Aug 11 11:04:15 ato kernel: [ 109.554503] [<ffffffff8135f79e>] > bus_remove_device+0xae/0xf0 > Aug 11 11:04:15 ato kernel: [ 109.554510] [<ffffffff8135d437>] > device_del+0x127/0x1d0 > Aug 11 11:04:15 ato kernel: [ 109.554519] [<ffffffff813d2b88>] > usb_disable_device+0xa8/0x130 > Aug 11 11:04:15 ato kernel: [ 109.554527] [<ffffffff813cbe65>] > usb_disconnect+0x95/0x130 > Aug 11 11:04:15 ato kernel: [ 109.554535] [<ffffffff813cd51d>] > hub_thread+0x48d/0x1210 > Aug 11 11:04:15 ato kernel: [ 109.554544] [<ffffffff8105771b>] ? > dequeue_task_fair+0x8b/0x90 > Aug 11 11:04:15 ato kernel: [ 109.554555] [<ffffffff8107e490>] ? > autoremove_wake_function+0x0/0x40 > Aug 11 11:04:15 ato kernel: [ 109.554563] [<ffffffff813cd090>] ? > hub_thread+0x0/0x1210 > Aug 11 11:04:15 ato kernel: [ 109.554571] [<ffffffff8107df36>] > kthread+0x96/0xa0 > Aug 11 11:04:15 ato kernel: [ 109.554580] [<ffffffff8100be64>] > kernel_thread_helper+0x4/0x10 > Aug 11 11:04:15 ato kernel: [ 109.554588] [<ffffffff8107dea0>] ? > kthread+0x0/0xa0 > Aug 11 11:04:15 ato kernel: [ 109.554595] [<ffffffff8100be60>] ? > kernel_thread_helper+0x0/0x10 > Aug 11 11:04:15 ato kernel: [ 109.554601] ---[ end trace 212263bbb326ec69 > ]--- > Aug 11 11:04:21 ato kernel: [ 116.450553] usb 1-5.4: new full speed USB > device using ehci_hcd and address 7 > Aug 11 11:04:22 ato kernel: [ 116.576230] generic-usb 0003:04D8:003F.0002: > hiddev0,hidraw1: USB HID v1.11 Device [Microchip Technology Inc. Simple HID > Device Demo] on usb-0000:00:12.2-5.4/input0 > Aug 11 11:04:23 ato kernel: [ 117.746427] usb 1-5.4: USB disconnect, address > 7 > Aug 11 11:04:23 ato kernel: [ 117.746500] ------------[ cut here > ]------------ > > > lan@ato:~/work/linux-2.6$ scripts/ver_linux > If some fields are empty or look unusual you may have an old version. > Compare to the current minimal requirements in Documentation/Changes. > > Linux ato 2.6.35+ #19 SMP Wed Aug 11 10:53:49 EDT 2010 x86_64 GNU/Linux > > Gnu C 4.4.3 > Gnu make 3.81 > binutils 2.20.1 > util-linux 2.17.2 > mount support > module-init-tools 3.11.1 > e2fsprogs 1.41.11 > pcmciautils 014 > Linux C Library 2.11.1 > Dynamic linker (ldd) 2.11.1 > Procps 3.2.8 > Net-tools 1.60 > Kbd 1.15 > Sh-utils 7.4 > wireless-tools 30 > Modules Loaded usbhid hid binfmt_misc fbcon tileblit font bitblit > softcursor snd_hda_codec_nvhdmi nouveau snd_hda_codec_realtek snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm_oss ttm drm_kms_helper snd_mixer_oss snd_pcm > drm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi ppdev parport_pc > snd_seq_midi_event snd_seq psmouse lp snd_timer parport i2c_algo_bit edac_core > video edac_mce_amd i2c_piix4 snd_seq_device serio_raw snd soundcore > snd_page_alloc output ohci1394 floppy pata_atiixp ieee1394 ahci libahci r8169 > mii This looks very similar to http://lkml.org/lkml/2010/8/10/373 I have not yet root-caused this, but I am not aware of any recent changes in usb-hid that might be causing that, so I suspect some change in USB core. But will have to investigate. -- Jiri Kosina SUSE Labs, Novell Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
