Additional info:
reporter:       libreport-2.6.3
WARNING: CPU: 2 PID: 626 at drivers/net/wireless/iwlwifi/pcie/trans.c:1413 iwl_trans_pcie_grab_nic_access+0x128/0x140 [iwlwifi]()
Timeout waiting for hardware access (CSR_GP_CNTRL 0x080403d8)
Modules linked in: rfcomm fuse ccm xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge 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 intel_rapl iosf_mbi x86_pkg_temp_thermal coretemp kvm_intel arc4 iwldvm kvm snd_hda_codec_hdmi mac80211 ppdev snd_hda_codec_idt iTCO_wdt uvcvideo iTCO_vendor_support hp_wmi sparse_keymap crct10dif_pclmul crc32_pclmul crc32c_intel videobuf2_vmalloc videobuf2_core tpm_infineon videobuf2_memops
 ghash_clmulni_intel v4l2_common btusb btbcm snd_hda_codec_generic snd_hda_intel btintel videodev iwlwifi snd_hda_controller snd_hda_codec media bluetooth snd_hda_core snd_hwdep cfg80211 snd_seq snd_seq_device snd_pcm rfkill snd_timer parport_pc lpc_ich tpm_tis parport tpm snd mfd_core hp_accel mei_me wmi soundcore mei shpchp lis3lv02d input_polldev nfsd auth_rpcgss nfs_acl lockd grace sunrpc 8021q garp stp llc mrp i915 serio_raw sdhci_pci i2c_algo_bit drm_kms_helper sdhci drm e1000e mmc_core firewire_ohci firewire_core ptp crc_itu_t pps_core video
CPU: 2 PID: 626 Comm: irq/34-iwlwifi Not tainted 4.1.6-201.fc22.x86_64 #1
Hardware name: Hewlett-Packard HP ProBook 6560b/1618, BIOS 68SCF Ver. F.03 04/27/2011
 0000000000000000 000000007c59ae67 ffff8800b6c7fb98 ffffffff81799a6d
 0000000000000000 ffff8800b6c7fbf0 ffff8800b6c7fbd8 ffffffff810a165a
 ffff8800b6c7fbb8 ffff8800b6c78000 0000000000000000 ffff8800b6c7bcb0
Call Trace:
 [<ffffffff81799a6d>] dump_stack+0x45/0x57
 [<ffffffff810a165a>] warn_slowpath_common+0x8a/0xc0
 [<ffffffff810a16e5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffffa05cd0b8>] iwl_trans_pcie_grab_nic_access+0x128/0x140 [iwlwifi]
 [<ffffffff810faef0>] ? irq_finalize_oneshot.part.29+0xf0/0xf0
 [<ffffffffa05be184>] iwl_read_direct32+0x34/0x90 [iwlwifi]
 [<ffffffffa05be82a>] iwl_dump_fh+0x11a/0x170 [iwlwifi]
 [<ffffffff810faef0>] ? irq_finalize_oneshot.part.29+0xf0/0xf0
 [<ffffffffa05c4521>] iwl_pcie_irq_handle_error+0x51/0x100 [iwlwifi]
 [<ffffffffa05c5bf2>] iwl_pcie_irq_handler+0xa12/0xf20 [iwlwifi]
 [<ffffffff813b1c56>] ? plist_del+0x46/0x70
 [<ffffffff810de886>] ? pick_next_task_fair+0x186/0x980
 [<ffffffff810136d6>] ? __switch_to+0x216/0x5d0
 [<ffffffff810faef0>] ? irq_finalize_oneshot.part.29+0xf0/0xf0
 [<ffffffff810faf10>] irq_thread_fn+0x20/0x50
 [<ffffffff810fb1cf>] irq_thread+0x13f/0x170
 [<ffffffff810fafe0>] ? wake_threads_waitq+0x30/0x30
 [<ffffffff810fb090>] ? irq_thread_dtor+0xb0/0xb0
 [<ffffffff810c0bf8>] kthread+0xd8/0xf0
 [<ffffffff810c0b20>] ? kthread_worker_fn+0x180/0x180
 [<ffffffff817a0422>] ret_from_fork+0x42/0x70
 [<ffffffff810c0b20>] ? kthread_worker_fn+0x180/0x180

Potential duplicate: bug 1193637