Commit 0effb865 authored by Marek Vasut's avatar Marek Vasut Committed by Mark Brown

ASoC: fsl_esai: use flat regmap cache

Same as commit ce492b3b
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: default avatarMarek Vasut <marex@denx.de>
Acked-by: default avatarNicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b4138868
...@@ -781,7 +781,7 @@ static const struct regmap_config fsl_esai_regmap_config = { ...@@ -781,7 +781,7 @@ static const struct regmap_config fsl_esai_regmap_config = {
.readable_reg = fsl_esai_readable_reg, .readable_reg = fsl_esai_readable_reg,
.volatile_reg = fsl_esai_volatile_reg, .volatile_reg = fsl_esai_volatile_reg,
.writeable_reg = fsl_esai_writeable_reg, .writeable_reg = fsl_esai_writeable_reg,
.cache_type = REGCACHE_RBTREE, .cache_type = REGCACHE_FLAT,
}; };
static int fsl_esai_probe(struct platform_device *pdev) static int fsl_esai_probe(struct platform_device *pdev)
......
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