BUG: sleeping function called from invalid context at kernel/mutex.c:88
in_atomic(): 1, irqs_disabled(): 0, pid: 0, name: swapper
Pid: 0, comm: swapper Not tainted 2.6.29.1-54.fc11.x86_64 #1
Call Trace:
<IRQ> [<ffffffff8104255c>] __might_sleep+0x10b/0x110
[<ffffffff813a8f2c>] mutex_lock+0x22/0x38
[<ffffffff8103f597>] ? enqueue_task_fair+0x2a/0x6d
[<ffffffff8122f794>] echo_char+0x25/0x81
[<ffffffff81230e03>] n_tty_receive_buf+0x309/0xe50
[<ffffffff8103be38>] ? task_rq_unlock+0x11/0x13
[<ffffffff81042d5c>] ? default_wake_function+0x12/0x14
[<ffffffff8103a1e0>] ? __wake_up_common+0x4e/0x84
[<ffffffff8104fe2d>] ? __tasklet_schedule+0x77/0x8e
[<ffffffff8102af47>] ? default_spin_lock_flags+0x9/0xe
[<ffffffff81232a48>] ? tty_ldisc_try+0x3c/0x44
[<ffffffff81233781>] flush_to_ldisc+0x10c/0x19f
[<ffffffff81233864>] tty_flip_buffer_push+0x50/0x61
[<ffffffffa03ab6ef>] acm_rx_tasklet+0x10c/0x28c [cdc_acm]
[<ffffffff81050025>] tasklet_action+0x8e/0xf8
[<ffffffff81050803>] __do_softirq+0x94/0x179
[<ffffffff810127cc>] call_softirq+0x1c/0x30
[<ffffffff8101394e>] do_softirq+0x52/0xb9
[<ffffffff81050426>] irq_exit+0x53/0x90
[<ffffffff81013c77>] do_IRQ+0x12c/0x151
[<ffffffff81011f13>] ret_from_intr+0x0/0x2e
<EOI> [<ffffffff812187bd>] ? acpi_idle_enter_bm+0x28f/0x2de
[<ffffffff812187b5>] ? acpi_idle_enter_bm+0x287/0x2de
[<ffffffff812ee957>] ? cpuidle_idle_call+0x8d/0xc2
[<ffffffff810102c7>] ? cpu_idle+0x68/0xb3
[<ffffffff813a435c>] ? start_secondary+0x199/0x19e
Partial trace by kernel line numbers:
drivers/char/n_tty.c:828
drivers/char/n_tty.c:1160
drivers/char/tty_buffer.c:444
drivers/char/tty_buffer.c:486
if (tty->low_latency)
flush_to_ldisc(&tty->buf.work.work);
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