Hi Larry,

0day kernel testing robot got the below dmesg and the first bad commit is

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git staging-next
commit 0629f3b8c33899140b48d5897259eab8ebae78ca
Author:     Larry Finger <Larry.Finger@lwfinger.net>
AuthorDate: Wed May 21 16:25:36 2014 -0500
Commit:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CommitDate: Fri May 23 11:33:56 2014 +0900

    staging: r8192ee: Turn on build of the new driver
        In addition, this commit contains a TODO file for this driver
        Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

+--------------------------------------------------------------------------+------------+------------+
|                                                                          | 0338f0c2e2 | 0629f3b8c3 |
+--------------------------------------------------------------------------+------------+------------+
| boot_successes                                                           | 60         | 0          |
| boot_failures                                                            | 0          | 20         |
| WARNING:CPU:PID:at_net/mac80211/rate.c:ieee80211_rate_control_register() | 0          | 20         |
| backtrace:rtl92e_rate_control_register                                   | 0          | 20         |
| backtrace:rtl_core_module_init                                           | 0          | 20         |
| backtrace:rtl92ee_module_init                                            | 0          | 20         |
| backtrace:kernel_init_freeable                                           | 0          | 20         |
+--------------------------------------------------------------------------+------------+------------+


[    5.211267] usbcore: registered new interface driver r8712u
[    5.212216] usbcore: registered new interface driver r8188eu
[    5.213112] ------------[ cut here ]------------
[    5.213893] WARNING: CPU: 0 PID: 1 at net/mac80211/rate.c:43 ieee80211_rate_control_register+0x70/0x100()
[    5.215552] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc6-01058-g0629f3b #1
[    5.216772] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    5.217655]  0000000000000009 ffff8800134dbde8 ffffffff8279b165 ffff8800134dbe20
[    5.219158]  ffffffff81091b47 ffff8800105762d0 ffffffff82ec7533 ffffffff833a12e0
[    5.220672]  0000000000000000 0000000000000000 ffff8800134dbe30 ffffffff81091c55
[    5.222182] Call Trace:
[    5.222689]  [<ffffffff8279b165>] dump_stack+0x19/0x1b
[    5.223534]  [<ffffffff81091b47>] warn_slowpath_common+0x67/0x90
[    5.224456]  [<ffffffff81091c55>] warn_slowpath_null+0x15/0x20
[    5.225352]  [<ffffffff826d2340>] ieee80211_rate_control_register+0x70/0x100
[    5.226405]  [<ffffffff834d721f>] ? rtw_drv_entry+0x93/0x93
[    5.227286]  [<ffffffff822f1130>] rtl92e_rate_control_register+0x10/0x20
[    5.228287]  [<ffffffff822de679>] rtl_core_module_init+0x29/0x90
[    5.229209]  [<ffffffff834d7229>] rtl92ee_module_init+0xa/0x68
[    5.230116]  [<ffffffff83485fd8>] do_one_initcall+0xab/0x152
[    5.230994]  [<ffffffff810ab3b8>] ? parse_args+0x128/0x3e0
[    5.231849]  [<ffffffff8348617e>] kernel_init_freeable+0xff/0x184
[    5.232775]  [<ffffffff83485839>] ? do_early_param+0x88/0x88
[    5.233656]  [<ffffffff82791d90>] ? rest_init+0xc0/0xc0
[    5.234492]  [<ffffffff82791d99>] kernel_init+0x9/0xf0
[    5.235312]  [<ffffffff827af40a>] ret_from_fork+0x7a/0xb0
[    5.236158]  [<ffffffff82791d90>] ? rest_init+0xc0/0xc0
[    5.236978] ---[ end trace 4a9c84431dc9672b ]---
[    5.237883] usbcore: registered new interface driver tranzport

git bisect start c602482222625524e9b9ca88ec9de7998adfdb9f v3.14 --
git bisect good 005fbcd03458b6c0044f65c1fe8d8a68d726a321  # 19:26     20+      0  Merge tag 'driver-core-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
git bisect good c7208164e66f63e3ec1759b98087849286410741  # 19:31     20+      0  Linux 3.15-rc7
git bisect good ee4d4e4c3a3a71ee9f6021e6c6649542ea8883d1  # 19:40     20+      0  Merge remote-tracking branch 'hwmon-staging/hwmon-next'
git bisect good 94feac0780312ef9eedd2d4f2865cc5bed30901f  # 19:50     20+      0  Merge remote-tracking branch 'usb/usb-next'
git bisect  bad a8173633b506e47fe8c604f6fb9d2f9216aaeec1  # 20:10      0-     12  Merge remote-tracking branch 'dma-mapping/dma-mapping-next'
git bisect  bad 0a7e26c59eb0b30e66107bb2b4506942e675bdf2  # 20:43      0-      7  Merge remote-tracking branch 'scsi/for-next'
git bisect  bad 9c443f2e7c7e70ae391ac744a32fb20fe1105a93  # 20:57      0-     18  Merge remote-tracking branch 'char-misc/char-misc-next'
git bisect  bad 3b169900adc7e60e2dcf072426790356a50eb444  # 21:02      0-     15  Merge remote-tracking branch 'staging/staging-next'
git bisect good 5a443893313811eebd4e9af0c1942873ace95c5f  # 21:07     20+      0  staging: rtl8723au: No need for CHKBIT since 16 + 12 is still < 32
git bisect  bad 563dce372fac66674c18a66777f0a01343a8e373  # 21:19      0-      1  staging: slicoss: remove unused members of struct adapter
git bisect good 1c1bc5f1dd86237c65f571ca72c75b285b0dceeb  # 21:31     20+      0  staging: rtl8723au: Call usb_read_interrupt() directly instead of via HAL layer
git bisect good 15897f6724f3e48b73f52db28b5a8a4107ebf723  # 21:36     20+      0  staging: vt6656: BBvSetVGAGainOffset remove camel case
git bisect  bad 1daffaeecb4bf01c4a34fc2330c745ace5af3f60  # 21:47      0-      4  staging: rtl8723au: ioctl_cfg80211.c: Properly initialize seq_ctrl
git bisect  bad 7989bcf3e21683f413dd1488718166d3ff474bf3  # 21:51      0-      5  staging: rtl8723au: Store algorithm type in a u32
git bisect good 007dfe5ad6d039df784b44285bae89654eab3258  # 22:01     20+      0  staging/skein: variable/member name cleanup
git bisect  bad 96808173627faebd1c39ab7af7630061bdd81c2a  # 22:09      0-      2  staging: rtl8723au: Fix compiling with CONFIG_8723AU_BT_COEXIST=n
git bisect good e22f4eda7fe495b5cdac5c27684487ab5f0a913f  # 22:14     20+      0  staging: r8192ee: Add code for Bluetooth coexistence
git bisect  bad 0629f3b8c33899140b48d5897259eab8ebae78ca  # 22:17      0-      2  staging: r8192ee: Turn on build of the new driver
git bisect good 0338f0c2e2420505ae815c57a79f7f553a8071bf  # 22:25     20+      0  staging: r8192ee: Add the files in the rtl8192ee directory
# first bad commit: [0629f3b8c33899140b48d5897259eab8ebae78ca] staging: r8192ee: Turn on build of the new driver
git bisect good 0338f0c2e2420505ae815c57a79f7f553a8071bf  # 22:27     60+      0  staging: r8192ee: Add the files in the rtl8192ee directory
git bisect  bad 531a533a5118b6dc809e141199b7c978e9edf066  # 22:27      0-     13  Add linux-next specific files for 20140526
git bisect good c7208164e66f63e3ec1759b98087849286410741  # 22:30     60+      0  Linux 3.15-rc7
git bisect  bad 531a533a5118b6dc809e141199b7c978e9edf066  # 22:30      0-     13  Add linux-next specific files for 20140526


This script may reproduce the error.

-----------------------------------------------------------------------------
#!/bin/bash

kernel=$1

kvm=(
	qemu-system-x86_64 -cpu kvm64 -enable-kvm 	
	-kernel $kernel
	-smp 2
	-m 256M
	-net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio
	-net user,vlan=0
	-net nic,vlan=1,model=e1000
	-net user,vlan=1
	-boot order=nc
	-no-reboot
	-watchdog i6300esb
	-serial stdio
	-display none
	-monitor null
)

append=(
	debug
	sched_debug
	apic=debug
	ignore_loglevel
	sysrq_always_enabled
	panic=10
	prompt_ramdisk=0
	earlyprintk=ttyS0,115200
	console=ttyS0,115200
	console=tty0
	vga=normal
	root=/dev/ram0
	rw
)

"${kvm[@]}" --append "${append[*]}"
-----------------------------------------------------------------------------

Thanks,
Jet