I am using the kernel 3.17-rc3 which I compiled today and
I get the warning below right before suspending to RAM:
[ 37.856537] ------------[ cut here ]------------
[ 37.856559] WARNING: CPU: 3 PID: 43 at /home/mafra/linux-2.6/net/mac80211/util.c:716 ieee80211_can_queue_work.isra.38+0x2d/0x40 [mac80211]()
[ 37.856559] queueing ieee80211 work while going to suspend
[ 37.856575] Modules linked in: ctr ccm nls_iso8859_1 nls_cp437 vfat fat arc4 b43 mac80211 snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_intel snd_hda_controller cfg80211 snd_hda_codec snd_hwdep x86_pkg_temp_thermal snd_pcm crc32c_intel ghash_clmulni_intel uvcvideo rfkill videobuf2_core bcm5974 ssb videobuf2_vmalloc videobuf2_memops snd_timer rtc_cmos
[ 37.856577] CPU: 3 PID: 43 Comm: kworker/3:1 Not tainted 3.17.0-rc3 #44
[ 37.856578] Hardware name: Apple Inc. MacBookPro10,2/Mac-AFD8A9D944EA4843, BIOS MBP102.88Z.0106.B01.1208311637 08/31/2012
[ 37.856583] Workqueue: events led_work_function
[ 37.856586] 0000000000000009 ffff88026409fd18 ffffffff816f6176 ffff88026409fd60
[ 37.856587] ffff88026409fd50 ffffffff81067343 ffff880263920660 ffff8802639222f0
[ 37.856589] 0000000000000000 0000000000000000 ffff88026f391300 ffff88026409fdb0
[ 37.856589] Call Trace:
[ 37.856594] [<ffffffff816f6176>] dump_stack+0x4d/0x6f
[ 37.856598] [<ffffffff81067343>] warn_slowpath_common+0x73/0x90
[ 37.856600] [<ffffffff810673a7>] warn_slowpath_fmt+0x47/0x50
[ 37.856604] [<ffffffff81091abc>] ? put_prev_entity+0x2c/0x3b0
[ 37.856606] [<ffffffff81094957>] ? pick_next_task_fair+0x1f7/0x8a0
[ 37.856615] [<ffffffffa015a75d>] ieee80211_can_queue_work.isra.38+0x2d/0x40 [mac80211]
[ 37.856622] [<ffffffffa015a790>] ieee80211_queue_work+0x20/0x40 [mac80211]
[ 37.856630] [<ffffffffa01e4947>] b43_led_brightness_set+0x27/0x30 [b43]
[ 37.856632] [<ffffffff815d0d93>] led_work_function+0x113/0x130
[ 37.856634] [<ffffffff8107bf46>] process_one_work+0x166/0x390
[ 37.856636] [<ffffffff8107c51b>] worker_thread+0x11b/0x490
[ 37.856638] [<ffffffff8107c400>] ? rescuer_thread+0x290/0x290
[ 37.856641] [<ffffffff81080f1d>] kthread+0xcd/0xf0
[ 37.856643] [<ffffffff81080e50>] ? kthread_create_on_node+0x170/0x170
[ 37.856645] [<ffffffff816fe62c>] ret_from_fork+0x7c/0xb0
[ 37.856647] [<ffffffff81080e50>] ? kthread_create_on_node+0x170/0x170
[ 37.856649] ---[ end trace 01a2610015279813 ]---
The reason for such an early suspend (37 seconds after booting) is
related to another issue which I hope to describe in another email but
which is "fixed" by a suspend cycle.
The wireless seems to be working fine right now though, using the 'b43'
module.
I'm not sure if the warning is new in 3.17-rcX since I haven't tested
the previous releases for a while (sorry), but I can test patches.
The kernel config and dmesg are here:
http://damtp.cam.ac.uk/user/crm66/dmesg-3.17-rc3.txt
http://damtp.cam.ac.uk/user/crm66/config-3.17-rc2+