Description of problem:
Resumed from suspend

Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 16457 at drivers/gpu/drm/i915/intel_display.c:7364 hsw_enable_pc8+0x5b8/0x660 [i915]()
SPLL enabled
Modules linked in: ccm uas usb_storage rfcomm fuse nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep arc4 vfat iwlmvm snd_hda_codec_realtek snd_hda_codec_generic intel_rapl mac80211 fat snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal snd_hda_intel coretemp kvm_intel snd_hda_controller btusb kvm snd_hda_codec iwlwifi bluetooth snd_hwdep snd_seq uvcvideo snd_seq_device cfg80211 videobuf2_vmalloc snd_pcm videobuf2_memops
 videobuf2_core v4l2_common videodev serio_raw media thinkpad_acpi i2c_i801 mei_me mei lpc_ich mfd_core shpchp snd_timer snd rfkill i2c_designware_platform tpm_tis wmi soundcore tpm i2c_designware_core nfsd auth_rpcgss nfs_acl lockd sunrpc dm_crypt i915 crct10dif_pclmul crc32_pclmul crc32c_intel e1000e i2c_algo_bit drm_kms_helper drm ghash_clmulni_intel ptp pps_core video
CPU: 1 PID: 16457 Comm: kworker/u16:3 Not tainted 3.17.8-300.fc21.x86_64 #1
Hardware name: LENOVO 20A7002QUS/20A7002QUS, BIOS GRET41WW (1.18 ) 10/30/2014
Workqueue: events_unbound async_run_entry_fn
 0000000000000000 00000000b761c5ab ffff8801c04c3c68 ffffffff81741aea
 ffff8801c04c3cb0 ffff8801c04c3ca0 ffffffff810970bd ffff88003f400000
 ffff880232702360 ffff880232702370 ffff880232702000 ffffffff81a8c6bc
Call Trace:
 [<ffffffff81741aea>] dump_stack+0x45/0x56
 [<ffffffff810970bd>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8109713c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa01632a8>] hsw_enable_pc8+0x5b8/0x660 [i915]
 [<ffffffffa01081d0>] ? __i915_drm_thaw+0x1d0/0x1d0 [i915]
 [<ffffffffa010822b>] i915_pm_suspend_late+0x5b/0x60 [i915]
 [<ffffffff814a55ac>] dpm_run_callback+0x4c/0x100
 [<ffffffff814a5d90>] __device_suspend_late+0xd0/0x1c0
 [<ffffffff814a5e9f>] async_suspend_late+0x1f/0xa0
 [<ffffffff810b7d69>] async_run_entry_fn+0x39/0x120
 [<ffffffff810af89d>] process_one_work+0x14d/0x400
 [<ffffffff810b022b>] worker_thread+0x6b/0x4a0
 [<ffffffff810b01c0>] ? rescuer_thread+0x2a0/0x2a0
 [<ffffffff810b531a>] kthread+0xea/0x100
 [<ffffffff810fd778>] ? do_setitimer+0x1d8/0x220
 [<ffffffff810b5230>] ? kthread_create_on_node+0x1a0/0x1a0
 [<ffffffff81748bfc>] ret_from_fork+0x7c/0xb0
 [<ffffffff810b5230>] ? kthread_create_on_node+0x1a0/0x1a0