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69b377b31b
The function hso_serial_common_free() is called either by the cleanup method of the tty or by the usb disconnect method. In the former case, the usb_disconnect() has been already called and the sysfs group associated to the device has been removed. By calling tty_unregister directly from the usb_disconnect() method, we avoid a warning due to the removal of the sysfs group of the usb device. Example of warning: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 778 at fs/sysfs/group.c:225 sysfs_remove_group+0x50/0x94() sysfs group c0645a88 not found for kobject 'ttyHS5' Modules linked in: CPU: 0 PID: 778 Comm: kworker/0:3 Tainted: G W 3.18.0+ #105 Workqueue: events release_one_tty [<c000dfe4>] (unwind_backtrace) from [<c000c014>] (show_stack+0x14/0x1c) [<c000c014>] (show_stack) from [<c0016bac>] (warn_slowpath_common+0x5c/0x7c) [<c0016bac>] (warn_slowpath_common) from [<c0016c60>] (warn_slowpath_fmt+0x30/0x40) [<c0016c60>] (warn_slowpath_fmt) from [<c00ddd14>] (sysfs_remove_group+0x50/0x94) [<c00ddd14>] (sysfs_remove_group) from [<c0221e44>] (device_del+0x30/0x190) [<c0221e44>] (device_del) from [<c0221fb0>] (device_unregister+0xc/0x18) [<c0221fb0>] (device_unregister) from [<c0221fec>] (device_destroy+0x30/0x3c) [<c0221fec>] (device_destroy) from [<c01fe1dc>] (tty_unregister_device+0x2c/0x5c) [<c01fe1dc>] (tty_unregister_device) from [<c029a428>] (hso_serial_common_free+0x2c/0x88) [<c029a428>] (hso_serial_common_free) from [<c029a4c0>] (hso_serial_ref_free+0x3c/0xb8) [<c029a4c0>] (hso_serial_ref_free) from [<c01ff430>] (release_one_tty+0x30/0x84) [<c01ff430>] (release_one_tty) from [<c00271d4>] (process_one_work+0x21c/0x3c8) [<c00271d4>] (process_one_work) from [<c0027758>] (worker_thread+0x3d8/0x560) [<c0027758>] (worker_thread) from [<c002be4c>] (kthread+0xc0/0xcc) [<c002be4c>] (kthread) from [<c0009630>] (ret_from_fork+0x14/0x24) ---[ end trace cb88537fdc8fa208 ]--- Signed-off-by: Olivier Sobrie <olivier@sobrie.be> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| appletalk | ||
| arcnet | ||
| bonding | ||
| caif | ||
| can | ||
| cris | ||
| dsa | ||
| ethernet | ||
| fddi | ||
| hamradio | ||
| hippi | ||
| hyperv | ||
| ieee802154 | ||
| ipvlan | ||
| irda | ||
| phy | ||
| plip | ||
| ppp | ||
| slip | ||
| team | ||
| usb | ||
| vmxnet3 | ||
| wan | ||
| wimax | ||
| wireless | ||
| xen-netback | ||
| dummy.c | ||
| eql.c | ||
| ifb.c | ||
| Kconfig | ||
| LICENSE.SRC | ||
| loopback.c | ||
| macvlan.c | ||
| macvtap.c | ||
| Makefile | ||
| mdio.c | ||
| mii.c | ||
| netconsole.c | ||
| nlmon.c | ||
| ntb_netdev.c | ||
| rionet.c | ||
| sb1000.c | ||
| Space.c | ||
| sungem_phy.c | ||
| tun.c | ||
| veth.c | ||
| virtio_net.c | ||
| vxlan.c | ||
| xen-netfront.c | ||