[Bug 87060] New: WARNING: CPU: 1 PID: 1395 at drivers/gpu/drm/i915/i915_gem_execbuffer.c:125 eb_lookup_vmas.isra.15+0x345/0x3e0 [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87060

            Bug ID: 87060
           Summary: WARNING: CPU: 1 PID: 1395 at
                    drivers/gpu/drm/i915/i915_gem_execbuffer.c:125
                    eb_lookup_vmas.isra.15+0x345/0x3e0 [i915]()
           Product: DRI
           Version: unspecified
          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: chris.cheney at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 110520
  --> https://bugs.freedesktop.org/attachment.cgi?id=110520&action=edit
dmesg output showing problem

Bug 83600 is the original master bug for the problem I am having. I tested
drm-intel-nightly bfdd01aa1825aa0068f9236b21362b550f6d630f via Ubuntu daily
build and now have the following problem. I still have problems with the DP
connector not working until I run the commands noted in comment #7 on Bug
83600, which is what you see starting at time 70.398954 in the dmesg output. I
have attached the exact set of commands to this bz along with dmesg with
drm.debug=0xe log_buf_len=4M. 

[    3.571751] ------------[ cut here ]------------
[    3.571786] WARNING: CPU: 1 PID: 1395 at
/home/apw/COD/linux/drivers/gpu/drm/i915/i915_gem_execbuffer.c:125
eb_lookup_vmas.isra.15+0x345/0x3e0 [i915]()
[    3.571787] GPU use of dumb buffer is illegal.
[    3.571788] Modules linked in: rfcomm bnep bluetooth intel_rapl
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm mxm_wmi
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw
gf128mul glue_helper ablk_helper cryptd serio_raw snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic lpc_ich mei_me mei shpchp
8250_fintek wmi mac_hid tpm_infineon snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep i915 snd_pcm snd_seq_midi snd_seq_midi_event
snd_rawmidi snd_seq video drm_kms_helper snd_seq_device snd_timer drm snd
soundcore parport_pc ppdev lp parport nls_iso8859_1 psmouse igb e1000e
firewire_ohci i2c_algo_bit firewire_core dca ahci ptp crc_itu_t libahci
pps_core
[    3.571814] CPU: 1 PID: 1395 Comm: Xorg Not tainted 3.18.0-994-generic
#201412052105
[    3.571815] Hardware name: Gigabyte Technology Co., Ltd.
Z87X-UD5H/Z87X-UD5H-CF, BIOS F10 08/21/2014
[    3.571817]  000000000000007d ffff8807f0ebfb88 ffffffff827a5d81
0000000000000007
[    3.571818]  ffff8807f0ebfbd8 ffff8807f0ebfbc8 ffffffff82074b0c
ffff8807f0fb8950
[    3.571819]  ffff8807efd08100 ffff8807efd08000 ffff8807f0ebfc78
ffff8807ef88d200
[    3.571821] Call Trace:
[    3.571829]  [<ffffffff827a5d81>] dump_stack+0x46/0x58
[    3.571835]  [<ffffffff82074b0c>] warn_slowpath_common+0x8c/0xc0
[    3.571836]  [<ffffffff82074bf6>] warn_slowpath_fmt+0x46/0x50
[    3.571849]  [<ffffffffc03f3715>] eb_lookup_vmas.isra.15+0x345/0x3e0 [i915]
[    3.571857]  [<ffffffffc03f41f7>] i915_gem_do_execbuffer.isra.23+0x257/0x710
[i915]
[    3.571865]  [<ffffffffc03f5474>] ? i915_gem_execbuffer2+0x84/0x2d0 [i915]
[    3.571872]  [<ffffffffc03f54b6>] i915_gem_execbuffer2+0xc6/0x2d0 [i915]
[    3.571883]  [<ffffffffc0309e56>] drm_ioctl+0x2e6/0x590 [drm]
[    3.571891]  [<ffffffffc03f53f0>] ? i915_gem_execbuffer+0x440/0x440 [i915]
[    3.571895]  [<ffffffff82202575>] do_vfs_ioctl+0x75/0x2c0
[    3.571897]  [<ffffffff8220cbb5>] ? __fget_light+0x25/0x70
[    3.571899]  [<ffffffff82202851>] SyS_ioctl+0x91/0xb0
[    3.571901]  [<ffffffff827b35ed>] system_call_fastpath+0x16/0x1b
[    3.571902] ---[ end trace 4596cf7e65c3fd9a ]---

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