Additional info:
reporter:       libreport-2.2.0
WARNING: CPU: 0 PID: 4345 at drivers/gpu/drm/i915/intel_uncore.c:125 gen6_gt_check_fifodbg.isra.9+0x38/0x50 [i915]()
MMIO read or write has been dropped ffffffff
Modules linked in: tun tcp_lp fuse ip6t_rpfilter ip6t_REJECT xt_conntrack bnep bluetooth cfg80211 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 eeepc_wmi asus_wmi sparse_keymap iTCO_wdt rfkill iTCO_vendor_support x86_pkg_temp_thermal snd_hda_codec_realtek coretemp kvm_intel snd_hda_codec_hdmi kvm crct10dif_pclmul snd_hda_intel snd_hda_codec crc32_pclmul crc32c_intel snd_hwdep snd_seq snd_seq_device snd_pcm ghash_clmulni_intel joydev r8169 microcode mii snd_page_alloc lpc_ich snd_timer hid_logitech_dj serio_raw i2c_i801
snd mfd_core mei_me soundcore mei wmi shpchp i915 i2c_algo_bit drm_kms_helper drm i2c_core video
CPU: 0 PID: 4345 Comm: kworker/u8:19 Not tainted 3.13.5-202.fc20.x86_64 #1
Hardware name: ASUS All Series/H81I-PLUS, BIOS 0503 08/30/2013
Workqueue: i915 gen6_force_wake_work [i915]
0000000000000009 ffff880068d71d38 ffffffff81686f7c ffff880068d71d80
ffff880068d71d70 ffffffff8106d47d ffff880211ee0020 ffff880211ee0028
0000000000000292 ffff8802130ca200 0000000000000100 ffff880068d71dd0
Call Trace:
[<ffffffff81686f7c>] dump_stack+0x45/0x56
[<ffffffff8106d47d>] warn_slowpath_common+0x7d/0xa0
[<ffffffff8106d4ec>] warn_slowpath_fmt+0x4c/0x50
[<ffffffffa00f8b28>] gen6_gt_check_fifodbg.isra.9+0x38/0x50 [i915]
[<ffffffffa00f8bcb>] __gen6_gt_force_wake_mt_put+0x2b/0x30 [i915]
[<ffffffffa00f88f7>] gen6_force_wake_work+0x37/0x50 [i915]
[<ffffffff81087b56>] process_one_work+0x176/0x430
[<ffffffff8108878b>] worker_thread+0x11b/0x3a0
[<ffffffff81088670>] ? rescuer_thread+0x350/0x350
[<ffffffff8108f252>] kthread+0xd2/0xf0
[<ffffffff8108f180>] ? insert_kthread_work+0x40/0x40
[<ffffffff81695ebc>] ret_from_fork+0x7c/0xb0
[<ffffffff8108f180>] ? insert_kthread_work+0x40/0x40