[Bug 460857] Re: ftdi serial driver broken in linux-image-2.6.31-14-generic (2.6.31-14.48)

[Debabrata Banerjee]

I'm running  kernel "2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57
UTC 2010 x86_64" and I'm still affected by the nearly the same problem.
Although I can get some data, after a few seconds of data I end up in
the same state and no data will pass. All subsequent close/open's on
/dev/ttyUSB0 will block forever and the parent process will zombie.
Quite annoying as I have no IR remote control after upgrading my
mythbuntu :(

[  960.770389] INFO: task irserver64:2122 blocked for more than 120 seconds.
[  960.770397] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  960.770404] irserver64    D ffffffff81557ea0     0  2122   2111 0x00000000
[  960.770416]  ffff8800111b9a38 0000000000000046 0000000000015bc0 0000000000015bc0
[  960.770426]  ffff880026a8c890 ffff8800111b9fd8 0000000000015bc0 ffff880026a8c4d0
[  960.770435]  0000000000015bc0 ffff8800111b9fd8 0000000000015bc0 ffff880026a8c890
[  960.770443] Call Trace:
[  960.770459]  [<ffffffff813d4d85>] usb_kill_urb+0x85/0xc0
[  960.770470]  [<ffffffff81085320>] ? autoremove_wake_function+0x0/0x40
[  960.770496]  [<ffffffffa015d070>] ftdi_close+0x40/0x80 [ftdi_sio]
[  960.770512]  [<ffffffffa0138941>] serial_down+0x71/0x80 [usbserial]
[  960.770524]  [<ffffffffa0138c6e>] serial_close+0x7e/0xc0 [usbserial]
[  960.770536]  [<ffffffff8132ac23>] tty_release_dev+0x163/0x5e0
[  960.770544]  [<ffffffff81181da9>] ? locks_delete_lock+0x79/0xa0
[  960.770553]  [<ffffffff81540f1d>] ? unlock_kernel+0x2d/0x40
[  960.770560]  [<ffffffff81182023>] ? locks_remove_flock+0xe3/0x120
[  960.770567]  [<ffffffff8118269b>] ? vfs_lock_file+0x3b/0x40
[  960.770574]  [<ffffffff81182731>] ? locks_remove_posix+0x91/0xc0
[  960.770582]  [<ffffffff8132b0be>] tty_release+0x1e/0x30
[  960.770590]  [<ffffffff81144305>] __fput+0xf5/0x210
[  960.770597]  [<ffffffff81144445>] fput+0x25/0x30
[  960.770604]  [<ffffffff8114053d>] filp_close+0x5d/0x90
[  960.770613]  [<ffffffff81068d8f>] put_files_struct+0x7f/0xf0
[  960.770621]  [<ffffffff81068e54>] exit_files+0x54/0x70
[  960.770628]  [<ffffffff8106b3ab>] do_exit+0x14b/0x380
[  960.770636]  [<ffffffff8106b635>] do_group_exit+0x55/0xd0
[  960.770645]  [<ffffffff8107bf77>] get_signal_to_deliver+0x1d7/0x3d0
[  960.770654]  [<ffffffff81012a35>] do_signal+0x75/0x1c0
[  960.770664]  [<ffffffff812b736d>] ? __up_write+0xdd/0x150
[  960.770673]  [<ffffffff81153b98>] ? poll_select_copy_remaining+0xf8/0x150
[  960.770682]  [<ffffffff81012bdd>] do_notify_resume+0x5d/0x80
[  960.770690]  [<ffffffff8101347e>] int_signal+0x12/0x17

-- 
ftdi serial driver broken in linux-image-2.6.31-14-generic (2.6.31-14.48)
https://bugs.launchpad.net/bugs/460857
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