Using nvidia drivers produce the following trace with our current kernel; up to this they seem to work fine.

Cheers,
chris.



Dec  9 19:26:03 brenva kernel: ------------[ cut here ]------------
Dec  9 19:26:03 brenva kernel: WARNING: CPU: 2 PID: 1251 at
drivers/gpu/drm/drm_ioctl.c:143 drm
_setversion+0x17e/0x190 [drm]()
Dec  9 19:26:03 brenva kernel: No drm_driver.set_busid()
implementation provided by nv_drm_driv
er [nvidia]. Use drm_dev_set_unique() to set the unique name
explicitly.
Dec  9 19:26:03 brenva kernel: Modules linked in:
Dec  9 19:26:03 brenva kernel:  af_packet nct6775 hwmon_vid msr
dm_mirror dm_region_hash dm_log
 dm_mod gspca_sn9c20x gspca_main videodev media nvidia(PO)
 x86_pkg_temp_thermal intel_powerclam
p coretemp kvm_intel kvm drm crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel aes
ni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd
eeepc_wmi snd_seq_dummy asus_wm
i snd_hda_codec_realtek snd_seq_oss sparse_keymap igb
snd_seq_midi_event rfkill snd_hda_codec_h
dmi snd_hda_codec_generic snd_seq video snd_hda_intel snd_seq_device
snd_hda_controller iTCO_wd
t iTCO_vendor_support microcode snd_hda_codec snd_hwdep snd_pcm_oss
snd_mixer_oss snd_pcm ptp p
ps_core xhci_pci snd_timer dca xhci_hcd sb_edac 8250_fintek
i2c_algo_bit snd edac_core serio_ra
w soundcore mei_me mei tpm_infineon i2c_i801 lpc_ich tpm_tis shpchp
Dec  9 19:26:03 brenva kernel:  tpm processor evdev sch_fq_codel ipv6
autofs4 uas usb_storage h
id_generic usbhid hid ehci_pci ehci_hcd firewire_ohci mxm_wmi usbcore
firewire_core sr_mod usb_
common crc_itu_t wmi button ide_generic piix ide_pci_generic ide_core
ata_piix
Dec  9 19:26:03 brenva kernel: CPU: 2 PID: 1251 Comm: X Tainted: P
WC O   3.18.0-desktop
-1.mga5 #1
Dec  9 19:26:03 brenva kernel: Hardware name: System manufacturer
System Product Name/P9X79-E W
S, BIOS 1602 02/19/2014
Dec  9 19:26:03 brenva kernel:  0000000000000009 ffff8804252abcb8
ffffffff816aa553 000000000000
0007
Dec  9 19:26:03 brenva kernel:  ffff8804252abd08 ffff8804252abcf8
ffffffff8106b241 ffff8804252a
bd78
Dec  9 19:26:03 brenva kernel:  ffff8804252abdf8 ffff880423484000
ffff88042aaf9180 ffff88042348
4000
Dec  9 19:26:03 brenva kernel: Call Trace:
Dec  9 19:26:03 brenva kernel:  [<ffffffff816aa553>]
dump_stack+0x46/0x58
Dec  9 19:26:03 brenva kernel:  [<ffffffff8106b241>]
warn_slowpath_common+0x81/0xa0
Dec  9 19:26:03 brenva kernel:  [<ffffffff8106b2a6>]
warn_slowpath_fmt+0x46/0x50
Dec  9 19:26:03 brenva kernel:  [<ffffffffc088215e>]
drm_setversion+0x17e/0x190 [drm]
Dec  9 19:26:03 brenva kernel:  [<ffffffffc0881aec>]
drm_ioctl+0x28c/0x670 [drm]
Dec  9 19:26:03 brenva kernel:  [<ffffffff81171584>] ?
tlb_flush_mmu_free+0x34/0x60
Dec  9 19:26:03 brenva kernel:  [<ffffffffc0881fe0>] ?
drm_noop+0x40/0x40 [drm]
Dec  9 19:26:03 brenva kernel:  [<ffffffff811c7038>]
do_vfs_ioctl+0x2c8/0x490
Dec  9 19:26:03 brenva kernel:  [<ffffffff811c7281>]
SyS_ioctl+0x81/0xa0
Dec  9 19:26:03 brenva kernel:  [<ffffffff816b14ad>]
system_call_fastpath+0x16/0x1b
Dec  9 19:26:03 brenva kernel: ---[ end trace df95f000bb9d1fb2 ]---


Reproducible: 

Steps to Reproduce: