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| author | Matthias Reichl <hias@horus.com> | 2023-12-04 01:22:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-13 20:45:24 +0300 |
| commit | 78c8fc333253077c5276bc3b4207818d45410acb (patch) | |
| tree | 6195162b012fcd6a0a40b71de15a44a587c1e23e | |
| parent | 2e04cfdd3edb9b4b2322304b158d27b82f6b4a58 (diff) | |
| download | linux-78c8fc333253077c5276bc3b4207818d45410acb.tar.xz | |
regmap: fix bogus error on regcache_sync success
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>
| -rw-r--r-- | drivers/base/regmap/regcache.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 92592f944a3d..ac63a73ccdaa 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -410,8 +410,7 @@ 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); |