[Bug 99745] New: [vlv] unclaimed register PIPE_CRC

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99745

            Bug ID: 99745
           Summary: [vlv] unclaimed register PIPE_CRC
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: chris at chris-wilson.co.uk
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

[  105.528589] ------------[ cut here ]------------
[  105.528721] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:795 __unclaimed_reg_debug+0x51/0x60 [i915]
[  105.528742] Unclaimed read from register 0x1e106c
[  105.528754] Modules linked in: i915(+) drm_kms_helper drm intel_gtt
i2c_algo_bit prime_numbers intel_powerclamp crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel cryptd lpc_ich mfd_core i2c_i801 battery video
i2c_designware_platform i2c_designware_core button autofs4 sd_mod ahci libahci
libata scsi_mod fan thermal i2c_hid i2c_core hid [last unloaded: i915]
[  105.528835] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G     U  W      
4.10.0-rc7+ #6
[  105.528853] Hardware name: GIGABYTE GB-BXBT-1900/MZBAYAB-00, BIOS F8
03/02/2016
[  105.528869] Call Trace:
[  105.528882]  <IRQ>
[  105.528900]  dump_stack+0x63/0x8e
[  105.528916]  __warn+0xd1/0xf0
[  105.528930]  warn_slowpath_fmt+0x4f/0x60
[  105.528946]  ? ttwu_do_wakeup+0x19/0xf0
[  105.529043]  __unclaimed_reg_debug+0x51/0x60 [i915]
[  105.529140]  fwtable_read32+0x17a/0x1e0 [i915]
[  105.529228]  i9xx_pipe_crc_irq_handler+0x116/0x160 [i915]
[  105.529316]  valleyview_pipestat_irq_handler+0x86/0xe0 [i915]
[  105.529404]  valleyview_irq_handler+0x170/0x210 [i915]
[  105.529420]  ? __next_timer_interrupt+0xb1/0xe0
[  105.529436]  __handle_irq_event_percpu+0x81/0x1c0
[  105.529450]  handle_irq_event_percpu+0x23/0x60
[  105.529464]  handle_irq_event+0x36/0x60
[  105.529478]  handle_edge_irq+0x7b/0x150
[  105.529493]  handle_irq+0x20/0x30
[  105.529508]  do_IRQ+0x46/0xd0
[  105.529522]  common_interrupt+0x89/0x89
[  105.529537] RIP: 0010:cpuidle_enter_state+0x153/0x2f0
[  105.529550] RSP: 0018:ffffffff81803df8 EFLAGS: 00000246 ORIG_RAX:
ffffffffffffff8d
[  105.529569] RAX: ffff88013fc183c0 RBX: ffffe8ffffc08d00 RCX:
000000000000001f
[  105.529581] RDX: 0000000000000000 RSI: ffff88013fc15a98 RDI:
0000000000000000
[  105.529594] RBP: ffffffff81803e30 R08: 0000000000000003 R09:
0000000000000e07
[  105.529607] R10: 00000000ffffffff R11: ffff88013fc152a4 R12:
0000000000000003
[  105.529620] R13: 0000000000000003 R14: 0000000000000000 R15:
00000018917bcfe4
[  105.529632]  </IRQ>
[  105.529647]  ? cpuidle_enter_state+0x12f/0x2f0
[  105.529661]  cpuidle_enter+0x17/0x20
[  105.529676]  call_cpuidle+0x2c/0x50
[  105.529689]  do_idle+0x102/0x1e0
[  105.529703]  cpu_startup_entry+0x1d/0x20
[  105.529718]  rest_init+0x85/0x90
[  105.529731]  start_kernel+0x41c/0x429
[  105.529746]  ? early_idt_handler_array+0x120/0x120
[  105.529760]  x86_64_start_reservations+0x2a/0x2c
[  105.529775]  x86_64_start_kernel+0x13b/0x14a
[  105.529789]  start_cpu+0x14/0x14
[  105.529802] ---[ end trace 7eff6599c6c80b74 ]---

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