Nicolin Chen 86a570c577 ASoC: fsl_asrc: Add reg_defaults for regmap to fix kernel dump ... Kernel dump (WARN_ON) ocurred during system boot-up inside regmap_write(): ------------[ cut here ]------------ WARNING: CPU: 0 PID: 47 at kernel/locking/lockdep.c:2744 lockdep_trace_alloc+0xe8/0x108() DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)) Modules linked in: CPU: 0 PID: 47 Comm: kworker/u2:2 Not tainted 3.18.0-rc1-10245-gb75d289-dirty #56 Workqueue: deferwq deferred_probe_work_func Backtrace: [<80012294>] (dump_backtrace) from [<80012578>] (show_stack+0x18/0x1c) r6:8097c73c r5:8097c73c r4:00000000 r3:be33ba80 [<80012560>] (show_stack) from [<806aac48>] (dump_stack+0x8c/0xa4) [<806aabbc>] (dump_stack) from [<8002a694>] (warn_slowpath_common+0x70/0x94) r6:80062838 r5:00000009 r4:bd827b30 r3:be33ba80 [<8002a624>] (warn_slowpath_common) from [<8002a6f0>] (warn_slowpath_fmt+0x38/0x40) r8:00000004 r7:00000001 r6:000080d0 r5:60000193 r4:bd826010 [<8002a6bc>] (warn_slowpath_fmt) from [<80062838>] (lockdep_trace_alloc+0xe8/0x108) r3:80831590 r2:8082e160 [<80062750>] (lockdep_trace_alloc) from [<800ea5dc>] (kmem_cache_alloc+0x28/0x134) r5:000080d0 r4:be001f00 [<800ea5b4>] (kmem_cache_alloc) from [<8038d72c>] (regcache_rbtree_write+0x15c/0x648) r10:00000000 r9:0000001c r8:00000004 r7:00000001 r6:00000000 r5:bd819a00 r4:00000000 r3:811aea88 [<8038d5d0>] (regcache_rbtree_write) from [<8038c4d8>] (regcache_write+0x5c/0x64) r10:be3f9f88 r9:00000000 r8:00000004 r7:00000001 r6:00000000 r5:00000001 r4:bd819a00 [<8038c47c>] (regcache_write) from [<8038b0dc>] (_regmap_raw_write+0x134/0x5f4) r6:be3f9f84 r5:00000001 r4:bd819a00 r3:00000001 [<8038afa8>] (_regmap_raw_write) from [<8038b610>] (_regmap_bus_raw_write+0x74/0x94) r10:00000000 r9:00000001 r8:be3fb080 r7:bd819a00 r6:00000001 r5:00000000 r4:bd819a00 [<8038b59c>] (_regmap_bus_raw_write) from [<8038a8b4>] (_regmap_write+0x60/0x9c) r6:00000001 r5:00000000 r4:bd819a00 r3:8038b59c [<8038a854>] (_regmap_write) from [<8038ba24>] (regmap_write+0x48/0x68) r7:bd81ad80 r6:00000001 r5:00000000 r4:bd819a00 [<8038b9dc>] (regmap_write) from [<80528f30>] (fsl_asrc_dai_probe+0x34/0x104) r6:bd888628 r5:be3fb080 r4:be3b4410 r3:be3b442c ------------[ dump end ]------------ ============================================================================= 2741 /* 2742 * Oi! Can't be having __GFP_FS allocations with IRQs disabled. 2743 */ 2744 if (DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))) 2745 return; ============================================================================= By looking at 2744 line, we can get that it's because regcache_rbtree_write() would call kmalloc() with GFP flag if it couldn't find an existing block to insert nodes while this kmalloc() call is inside a spin_lock_irq_save pair, i.e. IRQs disabled. Even though this may be a bug that should be fixed, I still try to send this patch as a quick fix (work around) since it does no harm to assign default values of every registers when using regcache. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>		2014-10-28 00:17:02 +00:00
..
aoa	ALSA: Use dma_zalloc_coherent	2014-06-16 11:39:45 +02:00
arm	ASoC: pxa2xx-ac97: prepare and unprepare the clocks	2014-06-09 21:11:18 +01:00
atmel	dmaengine: dw: split dma-dw.h to platform and private parts	2014-10-15 20:31:04 +05:30
core	ALSA: pcm: Fix referred substream in snd_pcm_action_group() unlock loop	2014-10-14 09:14:48 +02:00
drivers	ALSA: vx: Use nonatomic PCM ops	2014-09-15 15:52:03 +02:00
firewire	ALSA: bebob: Fix failure to detect source of clock for Terratec Phase 88	2014-10-10 17:25:30 +02:00
i2c	ALSA: cs8427: separate HW initialization	2014-04-03 14:59:48 +02:00
isa	ALSA: gus: remove checks for CONFIG_SND_DEBUG_ROM	2014-05-30 10:12:10 +02:00
mips	ALSA: au1x00: Use resource_size instead of computation	2014-05-28 17:50:57 +02:00
oss	sound fixes for 3.17-rc1	2014-08-15 18:06:56 -06:00
parisc	ALSA: parisc: Convert to snd_card_new() with a device pointer	2014-02-14 08:14:05 +01:00
pci	ALSA: hda_intel: Add Device IDs for Intel Sunrise Point PCH	2014-10-15 11:39:58 +02:00
pcmcia	ALSA: pdaudiocf: Use nonatomic PCM ops	2014-09-15 15:52:38 +02:00
ppc	of: Migrate of_find_node_by_name() users to for_each_node_by_name()	2014-06-26 17:12:24 +01:00
sh	ALSA: sh: Convert to snd_card_new() with a device pointer	2014-02-14 08:14:07 +01:00
soc	ASoC: fsl_asrc: Add reg_defaults for regmap to fix kernel dump	2014-10-28 00:17:02 +00:00
sparc	ALSA: Use dma_zalloc_coherent	2014-06-16 11:39:45 +02:00
spi	ALSA: spi: Convert to snd_card_new() with a device pointer	2014-02-14 08:14:08 +01:00
synth	ALSA: synth: emux: soundfont.c: Cleaning up memory leak	2014-06-01 14:33:09 +02:00
usb	sound updates for 3.18-rc1	2014-10-10 22:13:25 -04:00
ac97_bus.c
Kconfig
last.c
Makefile
sound_core.c	consolidate the reassignments of ->f_op in ->open() instances	2013-10-24 23:34:53 -04:00
sound_firmware.c