From b413886886b9a8f845f7d1a5adafa0ca573d3828 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 19 Sep 2016 21:30:25 +0200 Subject: ASoC: fsl_asrc: use flat regmap cache Same as commit ce492b3b8f99cf9d2f807ec22d8805c996a09503 Subject: drm/fsl-dcu: use flat regmap cache Using flat regmap cache instead of RB-tree to avoid the following lockdep warning on driver load: WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:2871 lockdep_trace_alloc+0x104/0x128 DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)) The RB-tree regmap cache needs to allocate new space on first writes. However, allocations in an atomic context (e.g. when a spinlock is held) are not allowed. The function regmap_write calls map->lock, which acquires a spinlock in the fast_io case. Since the driver uses MMIO, the regmap bus of type regmap_mmio is being used which has fast_io set to true. Signed-off-by: Marek Vasut Acked-by: Nicolin Chen Signed-off-by: Mark Brown --- sound/soc/fsl/fsl_asrc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound/soc/fsl/fsl_asrc.c') diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c index b7157ce23479..1d82f68305c3 100644 --- a/sound/soc/fsl/fsl_asrc.c +++ b/sound/soc/fsl/fsl_asrc.c @@ -726,7 +726,7 @@ static const struct regmap_config fsl_asrc_regmap_config = { .readable_reg = fsl_asrc_readable_reg, .volatile_reg = fsl_asrc_volatile_reg, .writeable_reg = fsl_asrc_writeable_reg, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_FLAT, }; /** -- cgit v1.2.3