Additional info:
reporter:       libreport-2.1.12
WARNING: CPU: 0 PID: 23567 at drivers/net/wireless/iwlwifi/pcie/trans.c:883 iwl_trans_pcie_grab_nic_access+0xcc/0xe0 [iwlwifi]()
Timeout waiting for hardware access (CSR_GP_CNTRL 0xffffffff)
Modules linked in: tcp_lp fuse nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6t_REJECT bnep bluetooth 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 iTCO_wdt iTCO_vendor_support snd_hda_codec_realtek microcode arc4 snd_hda_intel uvcvideo joydev iwldvm videobuf2_vmalloc mac80211 snd_hda_codec videobuf2_memops snd_hwdep videobuf2_core snd_seq serio_raw snd_seq_device videodev media iwlwifi snd_pcm i2c_i801 of_i2c lpc_ich cfg80211 atl2 snd_page_alloc snd_timer snd soundcore eeepc_laptop sparse_keymap
 rfkill mperf i915 i2c_algo_bit drm_kms_helper drm ata_generic i2c_core pata_acpi video usb_storage
CPU: 0 PID: 23567 Comm: kworker/0:2 Not tainted 3.11.10-301.fc20.i686 #1
Hardware name: ASUSTeK Computer INC. 900/900, BIOS 1006    03/03/2009
Workqueue: kacpi_notify acpi_os_execute_deferred
 00000000 00000000 ef0cbb54 c09795ee ef0cbb94 ef0cbb84 c0447b0e f7e33b68
 ef0cbbb0 00005c0f f7e33b3c 00000373 f7e2b23c f7e2b23c f5aa0000 f7e301e0
 f5aa1994 ef0cbb9c c0447b63 00000009 ef0cbb94 f7e33b68 ef0cbbb0 ef0cbbc8
Call Trace:
 [<c09795ee>] dump_stack+0x41/0x52
 [<c0447b0e>] warn_slowpath_common+0x7e/0xa0
 [<f7e2b23c>] ? iwl_trans_pcie_grab_nic_access+0xcc/0xe0 [iwlwifi]
 [<f7e2b23c>] ? iwl_trans_pcie_grab_nic_access+0xcc/0xe0 [iwlwifi]
 [<c0447b63>] warn_slowpath_fmt+0x33/0x40
 [<f7e2b23c>] iwl_trans_pcie_grab_nic_access+0xcc/0xe0 [iwlwifi]
 [<f7e211cf>] iwl_write_prph+0x1f/0x50 [iwlwifi]
 [<f7e28c76>] iwl_pcie_tx_stop+0x36/0x120 [iwlwifi]
 [<f7e2c595>] iwl_trans_pcie_stop_device+0xa5/0x1e0 [iwlwifi]
 [<f8406e8a>] iwl_down+0x1ea/0x2a0 [iwldvm]
 [<f840ea60>] iwlagn_mac_stop+0x60/0xd0 [iwldvm]
 [<f8482226>] ieee80211_stop_device+0x46/0xd0 [mac80211]
 [<f846d753>] ieee80211_do_stop+0x583/0x780 [mac80211]
 [<f846d967>] ieee80211_stop+0x17/0x20 [mac80211]
 [<c0893fd9>] __dev_close_many+0x69/0xb0
 [<c08940e2>] dev_close_many+0x72/0xd0
 [<c08958f7>] rollback_registered_many+0x97/0x1f0
 [<c0895aa5>] unregister_netdevice_many+0x15/0x50
 [<f846ef68>] ieee80211_remove_interfaces+0xd8/0x150 [mac80211]
 [<f845d786>] ieee80211_unregister_hw+0x56/0x100 [mac80211]
 [<f841ea5a>] ? iwl_leds_exit+0x2a/0x30 [iwldvm]
 [<f840fca4>] iwlagn_mac_unregister+0x24/0x30 [iwldvm]
 [<f8406274>] iwl_op_mode_dvm_stop+0x44/0xd0 [iwldvm]
 [<f7e225f1>] _iwl_op_mode_stop.isra.10+0x21/0x40 [iwlwifi]
 [<f7e22857>] iwl_drv_stop+0x27/0x80 [iwlwifi]
 [<f7e255a1>] iwl_pci_remove+0x21/0x40 [iwlwifi]
 [<c06abd2f>] pci_device_remove+0x2f/0xa0
 [<c0757a31>] __device_release_driver+0x61/0xc0
 [<c0757aad>] device_release_driver+0x1d/0x30
 [<c0757396>] bus_remove_device+0xb6/0x120
 [<c0753f9a>] ? device_remove_groups+0x2a/0x40
 [<c0753ff2>] ? device_remove_attrs+0x42/0x70
 [<c075462a>] device_del+0xea/0x170
 [<c06a6896>] pci_stop_bus_device+0x76/0x80
 [<c06a6960>] pci_stop_and_remove_bus_device+0x10/0x20
 [<f7d19539>] eeepc_rfkill_hotplug+0xa9/0x180 [eeepc_laptop]
 [<c06e0801>] ? acpi_system_write_wakeup_device+0xfc/0x13b
 [<f7d19769>] eeepc_rfkill_notify+0x19/0x20 [eeepc_laptop]
 [<c06ef705>] acpi_ev_notify_dispatch+0x35/0x4a
 [<c06ddcbb>] acpi_os_execute_deferred+0x20/0x2b
 [<c045e085>] process_one_work+0x115/0x380
 [<c045eb6e>] worker_thread+0xfe/0x330
 [<c045ea70>] ? manage_workers.isra.27+0x250/0x250
 [<c04641e4>] kthread+0x94/0xa0
 [<c0986877>] ret_from_kernel_thread+0x1b/0x28
 [<c0464150>] ? insert_kthread_work+0x30/0x30