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authorMarek Vasut <marex@denx.de>2016-09-19 21:30:25 +0200
committerMark Brown <broonie@kernel.org>2016-09-20 18:55:08 +0100
commitb413886886b9a8f845f7d1a5adafa0ca573d3828 (patch)
tree4f5610f2749b250c6bc7200600481738e9ade2be
parent3bcc8656722c84f10355054ed287c15c47e30a74 (diff)
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 <marex@denx.de> Acked-by: Nicolin Chen <nicoleotsuka@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/fsl/fsl_asrc.c2
1 files changed, 1 insertions, 1 deletions
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,
};
/**