Additional info:
WARNING: at drivers/net/wireless/iwlwifi/pcie/tx.c:584 iwl_enqueue_hcmd+0x65c/0x670 [iwlwifi]()
Hardware name: LIFEBOOK UH552
Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ib_iser nf_conntrack rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ebtable_filter ebtables ip6table_filter ip6_tables rfcomm bnep arc4 iwldvm snd_hda_codec_hdmi snd_hda_codec_realtek uvcvideo mac80211 snd_hda_intel snd_hda_codec snd_hwdep videobuf2_vmalloc videobuf2_memops videobuf2_core snd_seq coretemp videodev qmi_wwan cdc_wdm snd_seq_device snd_pcm usbnet mei media i2c_i801 mii kvm_intel iTCO_wdt btusb kvm iTCO_vendor_support snd_page_alloc lpc_ich qcserial iwlwifi cfg80211 bluetooth usb_wwan snd_timer mfd_core snd rfkill soundcore fujitsu_laptop microcode uinput i915 crc32c_intel i2c_algo_bit drm_kms_helper ghash_clmulni_intel drm i2c_core video ums_realtek usb_storage sunrpc
Pid: 761, comm: NetworkManager Not tainted 3.7.4-204.fc18.x86_64 #1
Call Trace:
 [<ffffffff8105e67f>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff8105e6da>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa01b599c>] iwl_enqueue_hcmd+0x65c/0x670 [iwlwifi]
 [<ffffffffa01b6454>] iwl_trans_pcie_send_cmd+0xe4/0x440 [iwlwifi]
 [<ffffffff81082590>] ? wake_up_bit+0x40/0x40
 [<ffffffffa04b4902>] iwl_dvm_send_cmd+0x52/0x140 [iwldvm]
 [<ffffffffa04b5c1f>] iwl_send_calib_results+0x6f/0xc0 [iwldvm]
 [<ffffffffa04b0a1d>] iwl_alive_notify+0x18d/0x1f0 [iwldvm]
 [<ffffffffa04b1002>] iwl_load_ucode_wait_alive+0x2b2/0x340 [iwldvm]
 [<ffffffffa04b06b0>] ? iwl_alloc_all+0x30/0x30 [iwldvm]
 [<ffffffffa04af1aa>] iwlagn_mac_start+0x13a/0x220 [iwldvm]
 [<ffffffffa03fd2fe>] ieee80211_do_open+0x2ce/0xae0 [mac80211]
 [<ffffffffa03fd040>] ? ieee80211_do_open+0x10/0xae0 [mac80211]
 [<ffffffffa03fdb81>] ieee80211_open+0x71/0x80 [mac80211]
 [<ffffffff815280cf>] __dev_open+0x8f/0xf0
 [<ffffffff81528391>] __dev_change_flags+0xa1/0x180
 [<ffffffff81528528>] dev_change_flags+0x28/0x70
 [<ffffffff81535cca>] do_setlink+0x37a/0xa10
 [<ffffffff812421f5>] ? ext4_ext_find_extent+0x325/0x390
 [<ffffffff812421f5>] ? ext4_ext_find_extent+0x325/0x390
 [<ffffffff81306411>] ? nla_parse+0x31/0xe0
 [<ffffffff81306411>] ? nla_parse+0x31/0xe0
 [<ffffffff81536d9e>] rtnl_newlink+0x36e/0x590
 [<ffffffff8128b779>] ? selinux_capable+0x39/0x50
 [<ffffffff815365c4>] rtnetlink_rcv_msg+0x114/0x300
 [<ffffffff815364b0>] ? __rtnl_unlock+0x20/0x20
 [<ffffffff8154fcc1>] netlink_rcv_skb+0xb1/0xc0
 [<ffffffff81533815>] rtnetlink_rcv+0x25/0x40
 [<ffffffff8154f5e1>] netlink_unicast+0x1a1/0x220
 [<ffffffff8154f961>] netlink_sendmsg+0x301/0x3c0
 [<ffffffff8150db9c>] sock_sendmsg+0xbc/0xf0
 [<ffffffff8150ea47>] ? sock_recvmsg+0xd7/0x110
 [<ffffffff8150e7fc>] __sys_sendmsg+0x3ac/0x3c0
 [<ffffffff81510949>] sys_sendmsg+0x49/0x90
 [<ffffffff8163e059>] system_call_fastpath+0x16/0x1b