This is a note to let you know that I've just added the patch titled
regmap: fix bogus error on regcache_sync success
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
regmap-fix-bogus-error-on-regcache_sync-success.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fea88064445a59584460f7f67d102b6e5fc1ca1d Mon Sep 17 00:00:00 2001
From: Matthias Reichl <hias@xxxxxxxxx>
Date: Sun, 3 Dec 2023 23:22:16 +0100
Subject: regmap: fix bogus error on regcache_sync success
From: Matthias Reichl <hias@xxxxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Matthias Reichl <hias@xxxxxxxxx>
Link: https://lore.kernel.org/r/20231203222216.96547-1-hias@xxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
Patches currently in stable-queue which might be from hias@xxxxxxxxx are
queue-5.15/regmap-fix-bogus-error-on-regcache_sync-success.patch
