Hi Feng, * Feng Hong <hongfeng@xxxxxxxxxxx> [2013-04-11 19:43:48 -0700]: > Hello, Marcel Holtmann, Gustavo Padovan, Johan Hedberg, > > What's your idea why below warning will happen ? > [ 651.865509] WARNING: at lib/kobject.c:198 kobject_add_internal+0x1f4/0x264() > [ 651.872894] kobject_add_internal failed for hci0:1 with -EEXIST, don't try to register things with the same name in the same directory. > [ 651.910125] [<c011991c>] (unwind_backtrace+0x0/0x11c) from [<c0134d3c>] (warn_slowpath_common+0x4c/0x64) > [ 651.920013] [<c0134d3c>] (warn_slowpath_common+0x4c/0x64) from [<c0134dd4>] (warn_slowpath_fmt+0x2c/0x3c) > [ 651.930053] [<c0134dd4>] (warn_slowpath_fmt+0x2c/0x3c) from [<c02d91e0>] (kobject_add_internal+0x1f4/0x264) > [ 651.940246] [<c02d91e0>] (kobject_add_internal+0x1f4/0x264) from [<c02d95f0>] (kobject_add+0x68/0x8c) > [ 651.949890] [<c02d95f0>] (kobject_add+0x68/0x8c) from [<c03323c8>] (device_add+0x104/0x5b8) > [ 651.958831] [<c03323c8>] (device_add+0x104/0x5b8) from [<c0547484>] (hci_conn_add_sysfs+0x4c/0x80) > [ 651.968109] [<c0547484>] (hci_conn_add_sysfs+0x4c/0x80) from [<c053996c>] (hci_event_packet+0x530/0x6428) > [ 651.978149] [<c053996c>] (hci_event_packet+0x530/0x6428) from [<c05342a8>] (hci_rx_work+0xd0/0x390) > [ 651.987640] [<c05342a8>] (hci_rx_work+0xd0/0x390) from [<c014ce24>] (process_one_work+0x280/0x488) > [ 651.996978] [<c014ce24>] (process_one_work+0x280/0x488) from [<c014d240>] (worker_thread+0x214/0x3b4) > [ 652.006652] [<c014d240>] (worker_thread+0x214/0x3b4) from [<c01511b4>] (kthread+0x80/0x8c) > [ 652.015228] [<c01511b4>] (kthread+0x80/0x8c) from [<c0113ed8>] (kernel_thread_exit+0x0/0x8) > [ 652.023925] ---[ end trace 7d6ac73956376f0a ]--- > [ 652.035034] Bluetooth: Failed to register connection device > > And if above really happen, the patch below can avoid system from panic, what's your comments on this protection ? I think that fc225c3f5 and other commits we recently added to bluetooth-next may help you with this. Could give bluetooth-next a try please and see if this is gone? Gustavo -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
