#12455 NORM 13.1.0: Serial warning on XO-4 B1

[Zarro Boogs per Child]

#12455: Serial warning on XO-4 B1
-----------------------+----------------------------------------------------
 Reporter:  greenfeld  |                 Owner:                                   
     Type:  defect     |                Status:  new                              
 Priority:  normal     |             Milestone:  13.1.0                           
Component:  kernel     |               Version:  Development build as of this date
 Keywords:             |           Next_action:  diagnose                         
 Verified:  0          |   Deployment_affected:                                   
Blockedby:             |              Blocking:                                   
-----------------------+----------------------------------------------------
 A warning on the serial port was seen in 13.1.0 os22 with Q7B11 and kernel
 3.5.7_xo4-20130108.0938.olpc.6f8ae67.

 This needs to be reproduced or spotted on a C1 to determine if it is still
 an issue.

 {{{
 [15445.172949] libertas_sdio mmc0:0001:1: mmc0:0001:1: suspend: PM flags =
 0x3
 [15445.172977] libertas_sdio mmc0:0001:1: Suspend without wake params --
 powering down card
 [15445.182271] mmc0: card 0001 removed
 [15445.183351] mmc0: configuring for no WOL wakeups: c1
 [15445.183466] PM: suspend of devices complete after 168.953 msecs
 [15445.183668] PM: late suspend of devices complete after 0.193 msecs
 [15445.183953] PM: noirq suspend of devices complete after 0.001 msecs
 [15445.184075] mmp3_pm_enter_d2
 [15445.184075] mmp3_pm_enter_d2 1
 [15445.184092] mmp3_pm_enter_d2 2
 [15445.184098] mmp3_pm_enter_d2 3
 [15445.184100] mmp3_pm_enter_d2 5
 [15445.184103] before suspend
 [15445.185828] mmp3_pm_enter_d2 10
 [15454.464319] after resume
 [15454.465212] PM: noirq resume of devices complete after 0.661 msecs
 [15454.465405] PM: early resume of devices complete after 0.082 msecs
 [15454.465640] ------------[ cut here ]------------
 [15454.465758] WARNING: at drivers/tty/serial/pxa.c:568
 serial_pxa_set_termios+0x23c/0x2f0()
 [15454.465791] [<c00157a4>] (unwind_backtrace+0x0/0x128) from [<c04177e8>]
 (dump_stack+0x20/0x24)
 [15454.465890] [<c04177e8>] (dump_stack+0x20/0x24) from [<c002108c>]
 (warn_slowpath_common+0x5c/0x74)
 [15454.465903] [<c002108c>] (warn_slowpath_common+0x5c/0x74) from
 [<c00210d0>] (warn_slowpath_null+0x2c/0x34)
 [15454.465903] [<c00210d0>] (warn_slowpath_null+0x2c/0x34) from
 [<c02273dc>] (serial_pxa_set_termios+0x23c/0x2f0)
 [15454.465916] [<c02273dc>] (serial_pxa_set_termios+0x23c/0x2f0) from
 [<c02230b0>] (uart_change_speed+0xbc/0xc0)
 [15454.465943] [<c02230b0>] (uart_change_speed+0xbc/0xc0) from
 [<c0225290>] (uart_resume_port+0x228/0x2dc)
 [15454.465943] [<c0225290>] (uart_resume_port+0x228/0x2dc) from
 [<c022780c>] (serial_pxa_resume+0x28/0x34)
 [15454.465957] [<c022780c>] (serial_pxa_resume+0x28/0x34) from
 [<c023112c>] (platform_pm_resume+0x50/0x5c)
 [15454.466001] [<c023112c>] (platform_pm_resume+0x50/0x5c) from
 [<c0236480>] (dpm_run_callback+0x54/0x90)
 [15454.466015] [<c0236480>] (dpm_run_callback+0x54/0x90) from [<c023736c>]
 (device_resume+0x154/0x1b4)
 [15454.466015] [<c023736c>] (device_resume+0x154/0x1b4) from [<c023797c>]
 (dpm_resume+0x104/0x24c)
 [15454.466035] [<c023797c>] (dpm_resume+0x104/0x24c) from [<c0237ca0>]
 (dpm_resume_end+0x1c/0x28)
 [15454.466047] [<c0237ca0>] (dpm_resume_end+0x1c/0x28) from [<c0056d84>]
 (suspend_devices_and_enter+0x230/0x33c)
 [15454.466066] [<c0056d84>] (suspend_devices_and_enter+0x230/0x33c) from
 [<c0056f8c>] (pm_suspend+0xfc/0x218)
 [15454.466078] [<c0056f8c>] (pm_suspend+0xfc/0x218) from [<c0055f38>]
 (state_store+0xac/0xc8)
 [15454.466107] [<c0055f38>] (state_store+0xac/0xc8) from [<c01d11b0>]
 (kobj_attr_store+0x1c/0x28)
 [15454.466123] [<c01d11b0>] (kobj_attr_store+0x1c/0x28) from [<c0134824>]
 (sysfs_write_file+0x110/0x158)
 [15454.466123] [<c0134824>] (sysfs_write_file+0x110/0x158) from
 [<c00d36bc>] (vfs_write+0xbc/0x148)
 [15454.466147] [<c00d36bc>] (vfs_write+0xbc/0x148) from [<c00d3950>]
 (sys_write+0x48/0x7c)
 [15454.466178] [<c00d3950>] (sys_write+0x48/0x7c) from [<c000ecc0>]
 (ret_fast_syscall+0x0/0x30)
 [15454.466188] ---[ end trace f02fd950a85d3c63 ]---
 [15454.592233] mmp3_usb_phy_init_internal: Init usb phy!!!
 [15454.642985] dcon_source_switch to CPU
 [15454.667212] olpc-dcon: The CPU has control
 [15454.733024] PM: resume of devices complete after 267.550 msecs
 [15455.074303] Restarting tasks ... done.
 [15455.253054] mmc0: new SDIO card at address 0001
 [15456.346247] libertas_sdio mmc0:0001:1: (unregistered net_device):
 20:7c:8f:96:6d:f6, fw 9.70.20p0, cap 0x000003a3
 [15456.370526] libertas_sdio mmc0:0001:1: wlan0: Marvell WLAN 802.11
 adapter
 [15456.421379] systemd-udevd[31781]: renamed network interface wlan0 to
 eth0
 [15456.823219] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/12455>
One Laptop Per Child <http://laptop.org/>
OLPC bug tracking system