[Bug 69397] New: [Baytrail-M] Machine boot up with "Call Trace"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69397

          Priority: medium
            Bug ID: 69397
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Baytrail-M] Machine boot up with "Call Trace"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: yangweix.shui at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 85887
  --> https://bugs.freedesktop.org/attachment.cgi?id=85887&action=edit
dmesg: boot up with call trace

Environment:
--------------------
Kernel: (drm-intel-next-queued)6c4a8962a4a078cacfc8eb5d4bd79f6343b8cd7a
Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date:   Tue Sep 10 14:54:42 2013 -0700
    drm/i915/vlv: re-enable hotplug detect based probing on VLV/BYT


lspci:
--------------------
00:02.0 VGA compatible controller: Intel Corporation ValleyView Gen7 (rev 0a)


Description:
--------------------
Test with latest -next-queued kernel, there's call trace in dmesg when machine
boot up. I tested other IVB platform, there's not this issue. Older kernels
also reproduceable. We are testing Baytrail machine recently, and it might not
be a regression. 


Call Trace:
--------------------
[    2.672633] fb: conflicting fb hw usage inteldrmfb vs EFI VGA - removing
gene
ric driver
[    2.672973] Console: switching to colour dummy device 80x25
[    2.691967] i915 0000:00:02.0: setting latency timer to 64
[    2.760073] [drm:intel_detect_pch], No PCH found?
[    2.760338] INFO: trying to register non-static key.
[    2.760351] the code is fine but needs lockdep annotation.
[    2.760358] turning off the locking correctness validator.
[    2.760369] CPU: 0 PID: 1191 Comm: systemd-udevd Not tainted
3.11.0-rc7_drm-i
ntel-next-queued_e14c68_20130912+ #1
[    2.760381] Hardware name: Intel Corp. VALLEYVIEW B2 PLATFORM/NOTEBOOK, BIOS
BBAYCRB1.X64.0055.R31.1308081542 BBAY_X64_R_V0055_31 08/08/2013
[    2.760394]  0000000000000000 ffff88003f9f16a8 ffffffff817d020f
0000000000000
006
[    2.760409]  ffffffff82859810 ffff88003f9f1778 ffffffff81089328
0000000000000006
[    2.760422]  0000000700046e00 ffffffff828a7470 0000000000000000
ffffffff00000000
[    2.760436] Call Trace:
[    2.760449]  [<ffffffff817d020f>] dump_stack+0x46/0x58
[    2.760465]  [<ffffffff81089328>] __lock_acquire+0x8b4/0x183b
[    2.760477]  [<ffffffff8108b004>] ? trace_hardirqs_on_caller+0x142/0x19e
[    2.760490]  [<ffffffff8108b06d>] ? trace_hardirqs_on+0xd/0xf
[    2.760501]  [<ffffffff8104fb0d>] ? __flush_work+0x3a/0x1cc
[    2.760513]  [<ffffffff8107b4ea>] ? vprintk_emit+0x453/0x47f
[    2.760524]  [<ffffffff8108a7b3>] lock_acquire+0xcc/0x106
[    2.760534]  [<ffffffff8104fd30>] ? flush_work+0x5/0x5a
[    2.760545]  [<ffffffff8108ae96>] ? mark_held_locks+0xce/0xfa
[    2.760556]  [<ffffffff8104fd61>] flush_work+0x36/0x5a
...............
...............

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