[Bug 65880] [HSW bisected] igt/module_reload randomly causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65880

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #17 from lu hua <huax.lu at intel.com> ---
I add "drm.debug=0xe" in grub. 
Following dmesg is all the log.

[    2.368840] [drm:intel_dp_i2c_aux_ch], [    2.379442] usb 1-1: new high-spee
                                                                               
                d USB device number 2 using ehci-pci
aux_i2c nack
[    2.507776] ------------[ cut here ]------------
[    2.563940] kernel BUG at drivers/gpu/drm/i915/i915_irq.c:122!
[    2.634889] invalid opcode: 0000 [#1] SMP
[    2.685015] Modules linked in: i915(+) drm_kms_helper drm button video
dm_mir                                                                         
                       ror dm_region_hash dm_log[    2.790642] tsc: Refined TSC
clocksource calibration                                                        
                                        : 2095.148 MHz
[    2.790646] Switching to clocksource tsc
 dm_mod
[    2.929994] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
3.10.0-rc5_irq-review_2                                                        
                                        0130705+ #1
[    3.028413] Hardware name: Intel Corporation Shark Bay Client
platform/SawToo                                                                
                                th Peak, BIOS HSWLPTU1.86C.0126.R00.1305121957
05/12/2013
[    3.175432] task: ffffffff81a5c410 ti: ffffffff81a4c000 task.ti:
ffffffff81a4                                                                   
                             c000
[    3.266451] RIP: 0010:[<ffffffffa008c3b4>]  [<ffffffffa008c3b4>]
ivb_can_enab                                                                   
                             le_err_int+0x20/0x41 [i915]
[    3.381965] RSP: 0018:ffff88015ee03ea0  EFLAGS: 00010046
[    3.446570] RAX: ffffffffa00d0101 RBX: ffff880158350000 RCX:
000000000000000a
[    3.533430] RDX: ffff880158350000 RSI: 0000000000044028 RDI:
ffff880158224000
[    3.620291] RBP: ffff880158224000 R08: 0000000000000000 R09:
ffff88015abe07d8
[    3.707157] R10: ffff88015abe07d8 R11: ffff88015abe07d8 R12:
0000000000000000
[    3.794017] R13: 0000000000000001 R14: 00000000ffffffff R15:
0000000000000001
[    3.880878] FS:  0000000000000000(0000) GS:ffff88015ee00000(0000)
knlGS:00000                                                                    
                            00000000000
[    3.979439] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.049401] CR2: 00007fff2da2f6b8 CR3: 000000015800b000 CR4:
00000000001407f0
[    4.136260] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[    4.223122] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[    4.309986] Stack:
[    4.334513]  ffffffffa008fbba ffff88015ee0d218 f4002529812b5a59
ffffffff81c30                                                                  
                              040
[    4.425218]  ffff88015a571380 ffff880158196a00 0000000000000000
0000000000000                                                                  
                              03b
[    4.515934]  0000000000000000 000000000000f000 ffffffff81082ef3
ffff880158196                                                                  
                              a00
[    4.606649] Call Trace:
[    4.636458]  <IRQ>
[    4.659852]  [<ffffffffa008fbba>] ? ivybridge_irq_handler+0x42b/0x4b2 [i915]
[    4.748179]  [<ffffffff81082ef3>] ? handle_irq_event_percpu+0x24/0x117
[    4.827650]  [<ffffffff81083014>] ? handle_irq_event+0x2e/0x4e
[    4.898668]  [<ffffffff81085326>] ? handle_edge_irq+0xbb/0xdc
[    4.968625]  [<ffffffff810038b6>] ? handle_irq+0x1a/0x1e
[    5.033300]  [<ffffffff8100359f>] ? do_IRQ+0x42/0xa7
[    5.093751]  [<ffffffff816e85aa>] ? common_interrupt+0x6a/0x6a
[    5.164765]  <EOI>
[    5.188165]  [<ffffffff816029de>] ? poll_idle+0x2a/0x67
[    5.254270]  [<ffffffff816029c6>] ? poll_idle+0x12/0x67
[    5.317893]  [<ffffffff81603d92>] ? menu_select+0x3a/0x41e
[    5.384684]  [<ffffffff81602c3d>] ? cpuidle_enter_state+0x43/0xac
[    5.458874]  [<ffffffff8105ef81>] ? ktime_get+0x4a/0xa7
[    5.522500]  [<ffffffff81602c31>] ? cpuidle_enter_state+0x37/0xac
[    5.596691]  [<ffffffff81602d72>] ? cpuidle_idle_call+0xcc/0x10a
[    5.669826]  [<ffffffff810085ec>] ? arch_cpu_idle+0x6/0x17
[    5.736620]  [<ffffffff8105e00d>] ? cpu_startup_entry+0x9f/0xfe
[    5.808698]  [<ffffffff81b0cc8c>] ? start_kernel+0x378/0x383
[    5.877604]  [<ffffffff81b0c72d>] ? repair_env_string+0x54/0x54
[    5.949674] Code: 10 10 10 00 89 c2 e9 41 a9 ff ff 48 8b 97 30 03 00 00 66
8b                                                                             
                    82 d4 17 00 00 38 c4 74 0e 48 8b 42 10 8a 48 04 31 c0 83 e1
07 eb 17 <0f> 0b 89                                                            
                                     c6 48 8b b4 f2 b8 22 00 00 80 be 18 09 00
00 00 75 09
[    6.189150] RIP  [<ffffffffa008c3b4>] ivb_can_enable_err_int+0x20/0x41
[i915]
[    6.276182]  RSP <ffff88015ee03ea0>
[    6.318671] ---[ end trace 64fc785fba98d319 ]---
[    6.374888] Kernel panic - not syncing: Fatal exception in interrupt

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