Frederik Deweerdt 208eee2a9d [ALSA] pcm_native: lockdep warning when launching jack ... When launching 'jackd -d alsa', lockdep issues the following warning: [39701.405086] ============================================= [39701.405093] [ INFO: possible recursive locking detected ] [39701.405107] 2.6.21-rc5-mm4 #2 [39701.405109] --------------------------------------------- [39701.405112] jackd/17366 is trying to acquire lock: [39701.405114] (&substream->self_group.lock){....}, at: [<c034d3c0>] snd_pcm_action_group+0x90/0x240 [39701.405131] [39701.405131] but task is already holding lock: [39701.405134] (&substream->self_group.lock){....}, at: [<c034d63f>] snd_pcm_action_lock_irq+0x3f/0xb0 [39701.405141] [39701.405142] other info that might help us debug this: [39701.405145] 3 locks held by jackd/17366: [39701.405147] #0: (snd_pcm_link_rwlock){....}, at: [<c034d627>] snd_pcm_action_lock_irq+0x27/0xb0 [39701.405155] #1: (&substream->group->lock){....}, at: [<c034d638>] snd_pcm_action_lock_irq+0x38/0xb0 [39701.405163] #2: (&substream->self_group.lock){....}, at: [<c034d63f>] snd_pcm_action_lock_irq+0x3f/0xb0 [39701.405171] [39701.405171] stack backtrace: [39701.405174] [<c0103b8a>] show_trace_log_lvl+0x1a/0x30 [39701.405179] [<c0104912>] show_trace+0x12/0x20 [39701.405183] [<c01049c6>] dump_stack+0x16/0x20 [39701.405187] [<c013b980>] __lock_acquire+0xbd0/0x1040 [39701.405193] [<c013be60>] lock_acquire+0x70/0x90 [39701.405197] [<c0407846>] _spin_lock+0x36/0x50 [39701.405203] [<c034d3c0>] snd_pcm_action_group+0x90/0x240 [39701.405207] [<c034d653>] snd_pcm_action_lock_irq+0x53/0xb0 [39701.405211] [<c035046f>] snd_pcm_common_ioctl1+0x35f/0xfb0 [39701.405215] [<c0351544>] snd_pcm_playback_ioctl1+0x34/0x420 [39701.405219] [<c03519f3>] snd_pcm_playback_ioctl+0x43/0x50 [39701.405223] [<c017ecc8>] do_ioctl+0x28/0x80 [39701.405229] [<c017ed77>] vfs_ioctl+0x57/0x290 [39701.405233] [<c017efe9>] sys_ioctl+0x39/0x60 [39701.405237] [<c0102bf4>] sysenter_past_esp+0x5d/0x99 [39701.405240] ======================= The attached lockdep annotation silences the warning. Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>		2007-05-11 16:55:57 +02:00
..
oss	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
seq	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
control_compat.c
control.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
device.c
hwdep_compat.c
hwdep.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
info_oss.c
info.c
init.c
isadma.c
Kconfig	misc doc and kconfig typos	2007-05-09 08:58:15 +02:00
Makefile
memalloc.c
memory.c
misc.c
pcm_compat.c
pcm_lib.c
pcm_memory.c
pcm_misc.c
pcm_native.c	[ALSA] pcm_native: lockdep warning when launching jack	2007-05-11 16:55:57 +02:00
pcm_timer.c
pcm.c
rawmidi_compat.c
rawmidi.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00
rtctimer.c	[ALSA] is_power_of_2 in rtctimer.c	2007-05-11 16:55:42 +02:00
sgbuf.c
sound_oss.c
sound.c
timer_compat.c
timer.c	header cleaning: don't include smp_lock.h when not used	2007-05-08 11:15:07 -07:00