Re: ✗ Fi.CI.BAT: failure for drm/i915: Add missing 'else' to intel_digital_port_connected()

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On Mon, Feb 15, 2016 at 03:21:54PM -0000, Patchwork wrote:
> == Summary ==
> 
> Series 3292v1 drm/i915: Add missing 'else' to intel_digital_port_connected()
> http://patchwork.freedesktop.org/api/1.0/series/3292/revisions/1/mbox/
> 
> Test gem_mmap_gtt:
>         Subgroup basic-small-copy-xy:
>                 pass       -> DMESG-FAIL (ilk-hp8440p)

Some kind of corrupted spinlock:

[  488.270400] BUG: unable to handle kernel paging request at 00000000ffffeef7
[  488.270487] IP: [<ffffffff810c9efc>] __lock_acquire+0x1ac/0x1f70
[  488.270555] PGD 13006a067 PUD 0 
[  488.270605] Oops: 0000 [#1] PREEMPT SMP 
[  488.270667] Modules linked in: snd_hda_intel i915 ax88179_178a usbnet mii snd_hda_codec_hdmi snd_hda_codec_generic intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul snd_hda_codec ghash_clmulni_intel snd_hwdep snd_hda_core snd_pcm mei_me mei lpc_ich sdhci_pci sdhci mmc_core e1000e ptp pps_core [last unloaded: i915]
[  488.271084] CPU: 0 PID: 6426 Comm: gem_mmap_gtt Tainted: G     U          4.5.0-rc3-gfxbench+ #1
[  488.271162] Hardware name: Hewlett-Packard HP EliteBook 8440p/172A, BIOS 68CCU Ver. F.24 09/13/2013
[  488.271240] task: ffff8800b4afcb00 ti: ffff880132314000 task.ti: ffff880132314000
[  488.271306] RIP: 0010:[<ffffffff810c9efc>]  [<ffffffff810c9efc>] __lock_acquire+0x1ac/0x1f70
[  488.271387] RSP: 0018:ffff880132317c10  EFLAGS: 00010002
[  488.271437] RAX: 0000000000000001 RBX: ffff8800b4afcb00 RCX: 0000000000000000
[  488.271499] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffeef7
[  488.271561] RBP: ffff880132317cd0 R08: 0000000000000001 R09: 0000000000000000
[  488.271623] R10: 00000000ffffeef7 R11: 0000000000000000 R12: 0000000000000000
[  488.271685] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[  488.271749] FS:  00007f700065a740(0000) GS:ffff880137c00000(0000) knlGS:0000000000000000
[  488.271820] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  488.271872] CR2: 00000000ffffeef7 CR3: 0000000130068000 CR4: 00000000000006f0
[  488.271934] Stack:
[  488.271958]  ffff880131f09c38 ffff8800b4afcb00 0000000000000005 0000000000000003
[  488.272047]  0000000000000001 ffff8800b4afd350 ffff880132317d08 00000000000000b8
[  488.272136]  ffffffff00000000 ffff880131f09bb8 ffff8801329d1bc0 ffff880132317d98
[  488.272224] Call Trace:
[  488.272256]  [<ffffffff81000ff7>] ? trace_hardirqs_on_thunk+0x17/0x19
[  488.272315]  [<ffffffff810cc533>] lock_acquire+0xc3/0x1d0
[  488.272368]  [<ffffffff81236e78>] ? drop_pagecache_sb+0x68/0xe0
[  488.272426]  [<ffffffff817b8c26>] _raw_spin_lock+0x36/0x50
[  488.272479]  [<ffffffff81236e78>] ? drop_pagecache_sb+0x68/0xe0
[  488.272535]  [<ffffffff81236e78>] drop_pagecache_sb+0x68/0xe0
[  488.272589]  [<ffffffff81236e10>] ? do_coredump+0xf70/0xf70
[  488.272645]  [<ffffffff811d3899>] iterate_supers+0xa9/0x100
[  488.272698]  [<ffffffff81236f3e>] drop_caches_sysctl_handler+0x4e/0xb0
[  488.272761]  [<ffffffff81246251>] proc_sys_call_handler+0xc1/0xe0
[  488.272817]  [<ffffffff8124627f>] proc_sys_write+0xf/0x20
[  488.272868]  [<ffffffff811cf263>] __vfs_write+0x23/0xe0
[  488.272920]  [<ffffffff810c5a22>] ? percpu_down_read+0x52/0x90
[  488.272975]  [<ffffffff811d35e4>] ? __sb_start_write+0xd4/0xf0
[  488.273030]  [<ffffffff811d35e4>] ? __sb_start_write+0xd4/0xf0
[  488.273085]  [<ffffffff811cffb4>] vfs_write+0xa4/0x190
[  488.273136]  [<ffffffff811ee67a>] ? __fget_light+0x6a/0x90
[  488.273188]  [<ffffffff811d0e54>] SyS_write+0x44/0xb0
[  488.273237]  [<ffffffff817b989b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  488.273294] Code: b7 a7 01 85 c0 75 0a 45 3b 7e 28 0f 85 1f 0a 00 00 4d 85 f6 75 40 45 31 e4 48 8d 65 d8 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <49> 81 3a c0 d4 ea 81 b8 00 00 00 00 44 0f 44 c0 41 83 ff 01 0f 
[  488.273912] RIP  [<ffffffff810c9efc>] __lock_acquire+0x1ac/0x1f70
[  488.273975]  RSP <ffff880132317c10>
[  488.274009] CR2: 00000000ffffeef7
[  488.274044] ---[ end trace cca43566d6f09c11 ]---

Imre and I had a look and this would seem to correspond to this C code:
	if (!prove_locking || lock->key == &__lockdep_no_validate__)
                check = 0;

so the passed lockdep_map was garbage for some reason.

> Test kms_pipe_crc_basic:
>         Subgroup suspend-read-crc-pipe-c:
>                 dmesg-warn -> PASS       (bsw-nuc-2)
> Test pm_rpm:
>         Subgroup basic-pci-d3-state:
>                 pass       -> DMESG-WARN (bsw-nuc-2)

*ERROR* Unclaimed access detected prior to suspending

Seems to have been there for quite a while. Filed a bug
https://bugs.freedesktop.org/show_bug.cgi?id=94164

>                 fail       -> PASS       (bdw-nuci7)
>         Subgroup basic-rte:
>                 dmesg-warn -> PASS       (bsw-nuc-2)
>                 pass       -> FAIL       (bdw-ultra)

The rpm tests seem unstable. Bunch of random fails here and
there. Filed https://bugs.freedesktop.org/show_bug.cgi?id=94163

> 
> bdw-nuci7        total:162  pass:152  dwarn:0   dfail:0   fail:0   skip:10 
> bdw-ultra        total:165  pass:151  dwarn:0   dfail:0   fail:1   skip:13 
> bsw-nuc-2        total:165  pass:135  dwarn:1   dfail:0   fail:0   skip:29 
> byt-nuc          total:165  pass:141  dwarn:0   dfail:0   fail:0   skip:24 
> hsw-brixbox      total:165  pass:151  dwarn:0   dfail:0   fail:0   skip:14 
> hsw-gt2          total:165  pass:154  dwarn:0   dfail:0   fail:1   skip:10 
> ilk-hp8440p      total:165  pass:115  dwarn:0   dfail:1   fail:1   skip:48 
> ivb-t430s        total:165  pass:150  dwarn:0   dfail:0   fail:1   skip:14 
> skl-i5k-2        total:165  pass:149  dwarn:1   dfail:0   fail:0   skip:15 
> snb-dellxps      total:165  pass:142  dwarn:0   dfail:0   fail:1   skip:22 
> snb-x220t        total:165  pass:142  dwarn:0   dfail:0   fail:2   skip:21 
> 
> Results at /archive/results/CI_IGT_test/Patchwork_1396/
> 
> f2110d8eac120416f8f5669f2aa561d9ab330a77 drm-intel-nightly: 2016y-02m-15d-09h-53m-04s UTC integration manifest
> bb6fd4ba57d864494466a3bd498428f71db09492 drm/i915: Add missing 'else' to intel_digital_port_connected()

-- 
Ville Syrjälä
Intel OTC
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