[Bug 89878] New: wakeup after STR causes drivers/gpu/drm/i915/intel_uncore.c:528 hsw_unclaimed_reg_debug.isra.11+0x78/0x90()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89878

            Bug ID: 89878
           Summary: wakeup after STR causes
                    drivers/gpu/drm/i915/intel_uncore.c:528
                    hsw_unclaimed_reg_debug.isra.11+0x78/0x90()
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: kaergel at b1-systems.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114833
  --> https://bugs.freedesktop.org/attachment.cgi?id=114833&action=edit
complete /var/log/messages

Hi,

i recognized the following issue on Lenovo t450s with intel hd550 graphics. OS
is gentoo, kernel version is 3.18.9-gentoo. 

Everytime i put the machine in STR (SuspendToRam) this issue occurs after
wakeup:

Apr  2 18:13:31 t450s kernel: ------------[ cut here ]------------
Apr  2 18:13:31 t450s kernel: WARNING: CPU: 0 PID: 3256 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x78/0x90()
Apr  2 18:13:31 t450s kernel: Unclaimed register detected before reading
register 0x130040
Apr  2 18:13:31 t450s kernel: Modules linked in: ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) x86_pkg_temp_thermal
Apr  2 18:13:31 t450s kernel: CPU: 0 PID: 3256 Comm: kworker/u16:14 Tainted: G 
         O   3.18.9-gentoo #13
Apr  2 18:13:31 t450s kernel: Hardware name: LENOVO 20BX000TGE/20BX000TGE, BIOS
JBET39WW (1.04 ) 12/09/2014
Apr  2 18:13:31 t450s kernel: Workqueue: events_unbound async_run_entry_fn
Apr  2 18:13:31 t450s kernel:  0000000000000009 ffff880087507b08
ffffffff819f49b9 ffffffff82042fb8
Apr  2 18:13:31 t450s kernel:  ffff880087507b58 ffff880087507b48
ffffffff81090b7c ffff880087507b38
Apr  2 18:13:31 t450s kernel:  ffff88034c360060 0000000000130040
0000000000000000 0000000000130040
Apr  2 18:13:31 t450s kernel: Call Trace:
Apr  2 18:13:31 t450s kernel:  [<ffffffff819f49b9>] dump_stack+0x46/0x58
Apr  2 18:13:31 t450s kernel:  [<ffffffff81090b7c>]
warn_slowpath_common+0x7c/0xa0
Apr  2 18:13:31 t450s kernel:  [<ffffffff81090be1>] warn_slowpath_fmt+0x41/0x50
Apr  2 18:13:31 t450s kernel:  [<ffffffff81556ee8>]
hsw_unclaimed_reg_debug.isra.11+0x78/0x90
Apr  2 18:13:31 t450s kernel:  [<ffffffff81512070>] ?
i915_resume_early+0x50/0x50
Apr  2 18:13:31 t450s kernel:  [<ffffffff81559849>] gen6_read32+0x59/0x130
Apr  2 18:13:31 t450s kernel:  [<ffffffff8156e377>] hsw_disable_pc8+0x37/0x360
Apr  2 18:13:31 t450s kernel:  [<ffffffff81511e4b>]
intel_resume_prepare+0x5bb/0x5e0
Apr  2 18:13:31 t450s kernel:  [<ffffffff81512070>] ?
i915_resume_early+0x50/0x50
Apr  2 18:13:31 t450s kernel:  [<ffffffff81512070>] ?
i915_resume_early+0x50/0x50
Apr  2 18:13:31 t450s kernel:  [<ffffffff81511fae>]
i915_drm_thaw_early+0x1e/0x70
Apr  2 18:13:31 t450s kernel:  [<ffffffff81512062>] i915_resume_early+0x42/0x50
Apr  2 18:13:31 t450s kernel:  [<ffffffff81512080>]
i915_pm_resume_early+0x10/0x20
Apr  2 18:13:31 t450s kernel:  [<ffffffff815ba4c0>] dpm_run_callback+0x40/0x100
Apr  2 18:13:31 t450s kernel:  [<ffffffff815ba823>]
device_resume_early+0xb3/0x1a0
Apr  2 18:13:31 t450s kernel:  [<ffffffff815ba92c>]
async_resume_early+0x1c/0x50
Apr  2 18:13:31 t450s kernel:  [<ffffffff810ae0c6>]
async_run_entry_fn+0x36/0xf0
Apr  2 18:13:31 t450s kernel:  [<ffffffff810a6cd8>]
process_one_work+0x148/0x3d0
Apr  2 18:13:31 t450s kernel:  [<ffffffff810a7079>] worker_thread+0x119/0x440
Apr  2 18:13:31 t450s kernel:  [<ffffffff810a6f60>] ?
process_one_work+0x3d0/0x3d0
Apr  2 18:13:31 t450s kernel:  [<ffffffff810ab9c4>] kthread+0xc4/0xe0
Apr  2 18:13:31 t450s kernel:  [<ffffffff810ab900>] ?
kthread_create_on_node+0x180/0x180
Apr  2 18:13:31 t450s kernel:  [<ffffffff819fdcac>] ret_from_fork+0x7c/0xb0
Apr  2 18:13:31 t450s kernel:  [<ffffffff810ab900>] ?
kthread_create_on_node+0x180/0x180
Apr  2 18:13:31 t450s kernel: ---[ end trace 54c0203525a243f6 ]---

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