I have a Dell Latitude D830 that is getting the same error, followed by a stack trace. I'm running a mainline kernel Linux foo.bar 4.0.0-040000-generic #201504121935 SMP Sun Apr 12 23:36:33 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Jul 30 18:46:28 9ZS43H1-D830 kernel: [ 4532.300047] iwl3945 0000:0c:00.0: Error sending C_POWER_TBL: time out after 500ms. Jul 30 18:46:28 9ZS43H1-D830 kernel: [ 4532.300061] iwl3945 0000:0c:00.0: set power fail, ret = -110 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.812046] iwl3945 0000:0c:00.0: Queue 2 stuck for 2004 ms. Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.812067] iwl3945 0000:0c:00.0: On demand firmware reload Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.847938] ieee80211 phy0: Hardware restart was requested Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.895831] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.895836] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.942555] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.942557] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.989268] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4532.989271] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.035980] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.035983] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.082702] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.082704] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120543] iwl3945 0000:0c:00.0: Unable to initialize device after 5 attempts. Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120551] ------------[ cut here ]------------ Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120591] WARNING: CPU: 1 PID: 24712 at /home/kernel/COD/linux/net/mac80211/util.c:1780 ieee80211_reconfig+0x72f/0x1c40 [mac80211]() Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120593] Hardware became unavailable during restart. Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120595] Modules linked in: ctr ccm snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec arc4 snd_hwdep snd_pcm iwl3945 iwlegacy dell_laptop dcdbas gpio_ich dell_wmi sparse_keymap coretemp snd_seq_midi snd_seq_midi_event i8k mac80211 pcmcia kvm cfg80211 snd_rawmidi yenta_socket snd_seq joydev snd_seq_device pcmcia_rsrc pcmcia_core serio_raw snd_timer lpc_ich snd mac_hid soundcore shpchp 8250_fintek parport_pc ppdev lp sunrpc parport autofs4 xts gf128mul dm_crypt hid_generic usbhid hid psmouse ahci libahci firewire_ohci nouveau firewire_core crc_itu_t pata_acpi tg3 mxm_wmi ptp i2c_algo_bit pps_core wmi ttm drm_kms_helper drm video Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120653] CPU: 1 PID: 24712 Comm: kworker/1:5 Not tainted 4.0.0-040000-generic #201504121935 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120655] Hardware name: Dell Inc. Latitude D830 /0HN338, BIOS A10 02/28/2008 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120668] Workqueue: events ieee80211_restart_work [mac80211] Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120671] 00000000000006f4 ffff8800227d3c98 ffffffff817e34b1 0000000000000007 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120674] ffff8800227d3ce8 ffff8800227d3cd8 ffffffff810791b7 ffff8800227d3cc8 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120677] ffff8800b65106a0 00000000fffffffb ffff8800bfb14940 ffff8800bfb19200 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120681] Call Trace: Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120689] [] dump_stack+0x45/0x57 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120695] [] warn_slowpath_common+0x97/0xe0 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120698] [] warn_slowpath_fmt+0x46/0x50 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120717] [] ieee80211_reconfig+0x72f/0x1c40 [mac80211] Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120721] [] ? mutex_lock+0x16/0x37 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120736] [] ? ieee80211_scan_cancel+0xc8/0x1f0 [mac80211] Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120749] [] ieee80211_restart_work+0x4c/0x80 [mac80211] Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120752] [] process_one_work+0x144/0x490 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120755] [] worker_thread+0x11e/0x450 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120758] [] ? create_worker+0x1f0/0x1f0 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120762] [] kthread+0xc9/0xe0 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120765] [] ? flush_kthread_worker+0x90/0x90 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120769] [] ret_from_fork+0x58/0x90 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120772] [] ? flush_kthread_worker+0x90/0x90 Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120774] ---[ end trace 11703f27d0a752c0 ]--- Jul 30 18:46:29 9ZS43H1-D830 kernel: [ 4533.120792] wlan0: deauthenticating from 00:14:d1:e6:80:28 by local choice (Reason: 3=DEAUTH_LEAVING)