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| author | Marek Vasut <marex@denx.de> | 2016-09-19 21:30:26 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-09-20 18:55:22 +0100 |
| commit | 0effb8651ee3b00513fbba9ef3912bbcbbd38af6 (patch) | |
| tree | 0f1bec60cc7858e8e69c9f6dfbf5ef9f94f7ad15 /sound/soc/fsl | |
| parent | b413886886b9a8f845f7d1a5adafa0ca573d3828 (diff) | |
| download | linux-0effb8651ee3b00513fbba9ef3912bbcbbd38af6.tar.bz2 | |
ASoC: fsl_esai: 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 <marex@denx.de>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/fsl')
| -rw-r--r-- | sound/soc/fsl/fsl_esai.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index e927955ba982..38bfd46f4ad8 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -781,7 +781,7 @@ static const struct regmap_config fsl_esai_regmap_config = { .readable_reg = fsl_esai_readable_reg, .volatile_reg = fsl_esai_volatile_reg, .writeable_reg = fsl_esai_writeable_reg, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_FLAT, }; static int fsl_esai_probe(struct platform_device *pdev) |