5.15-stable review patch. If anyone has any objections, please let me know.
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From: Matthias Reichl hias@horus.com
commit fea88064445a59584460f7f67d102b6e5fc1ca1d upstream.
Since commit 0ec7731655de ("regmap: Ensure range selector registers are updated after cache sync") opening pcm512x based soundcards fail with EINVAL and dmesg shows sync cache and pm_runtime_get errors:
[ 228.794676] pcm512x 1-004c: Failed to sync cache: -22 [ 228.794740] pcm512x 1-004c: ASoC: error at snd_soc_pcm_component_pm_runtime_get on pcm512x.1-004c: -22
This is caused by the cache check result leaking out into the regcache_sync return value.
Fix this by making the check local-only, as the comment above the regcache_read call states a non-zero return value means there's nothing to do so the return value should not be altered.
Fixes: 0ec7731655de ("regmap: Ensure range selector registers are updated after cache sync") Cc: stable@vger.kernel.org Signed-off-by: Matthias Reichl hias@horus.com Link: https://lore.kernel.org/r/20231203222216.96547-1-hias@horus.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/base/regmap/regcache.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -404,8 +404,7 @@ out: rb_entry(node, struct regmap_range_node, node);
/* If there's nothing in the cache there's nothing to sync */ - ret = regcache_read(map, this->selector_reg, &i); - if (ret != 0) + if (regcache_read(map, this->selector_reg, &i) != 0) continue;
ret = _regmap_write(map, this->selector_reg, i);