WARNING: at drivers/usb/serial/usb-serial.c:324 serial_write_room+0x44/0x54 [usbserial]() In /var/log/messages In Both Leaf Infiniband Switches (Doc ID 1667779.1)

Last updated on APRIL 30, 2014

Applies to:

Exadata X3-2 Hardware - Version All Versions and later
Information in this document applies to any platform.

Goal

 

The following meaasges were being logged on both Leaf switches:

Apr 21 15:33:14 exa01sw-ibb0 init: Id "co" respawning too fast: disabled for 5 minutes
Apr 21 15:45:49 exa01sw-ibb0 kernel: ------------[ cut here ]------------
Apr 21 15:45:49 exa01sw-ibb0 kernel: WARNING: at drivers/usb/serial/usb-serial.c:324 serial_write_room+0x44/0x54 [usbserial]()
Apr 21 15:45:49 exa01sw-ibb0 kernel: Modules linked in: iptable_filter ip_tables x_tables ib_ipoib ib_sa inet_lro ib_umad i2c_dev jida(P) pl2303 usbserial
ib_is4 ib_mad ib_core e1000e i2c_isch i2c_core shpchp pcspkr rtc_cmos rtc_core rtc_lib ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Apr 21 15:45:49 exa01sw-ibb0 kernel: Pid: 5, comm: events/0 Tainted: P W 2.6.27.13-nm2 #1
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] warn_on_slowpath+0x40/0x63
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] pl2303_send+0x1a1/0x221 [pl2303]
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] place_entity+0x96/0xd4
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] check_preempt_wakeup+0x111/0x119
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] try_to_wake_up+0x11c/0x126
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] __wake_up_common+0x2f/0x5a
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] serial_write_room+0x44/0x54 [usbserial]
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] tty_write_room+0x15/0x16
Apr 21 15:45:49 exa01sw-ibb0 kernel: [] opost+0xf/0x196
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] n_tty_receive_buf+0x8e1/0xc6a
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] __dequeue_entity+0x1f/0x7a
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] set_next_entity+0x14/0x39
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] pick_next_task_fair+0x8e/0x99
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] schedule+0x6cd/0x71a
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] flush_to_ldisc+0xd5/0x156
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] flush_to_ldisc+0x0/0x156
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] run_workqueue+0x69/0xdd
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] worker_thread+0x0/0xbd
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] worker_thread+0xb3/0xbd
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] autoremove_wake_function+0x0/0x2d
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] kthread+0x38/0x5f
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] kthread+0x0/0x5f
Apr 21 15:45:50 exa01sw-ibb0 kernel: [] kernel_thread_helper+0x7/0x10
Apr 21 15:45:50 exa01sw-ibb0 kernel: =======================
Apr 21 15:45:50 exa01sw-ibb0 kernel: ---[ end trace 86bbe7d674113ab2 ]---
Apr 21 15:45:50 exa01sw-ibb0 kernel: ------------[ cut here ]------------
 

Solution

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