linux-kernel - [PATCH] regmap: Handle sparse caches in the default sync

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Message-Id: <20230325-regcache-sparse-sync-v1-1-2a890239d061@kernel.org>
Date:   Sat, 25 Mar 2023 21:49:49 +0000
From:   Mark Brown <broonie@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Mark Brown <broonie@...nel.org>
Subject: [PATCH] regmap: Handle sparse caches in the default sync

If there is no cache entry available we will get -ENOENT from the cache
implementation, handle this gracefully and skip rather than treating it as
an error.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/base/regmap/regcache.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 362e043e26d8..c1b020c5a6a9 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -311,6 +311,8 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
 			continue;
 
 		ret = regcache_read(map, reg, &val);
+		if (ret == -ENOENT)
+			continue;
 		if (ret)
 			return ret;
 

---
base-commit: e8d018dd0257f744ca50a729e3d042cf2ec9da65
change-id: 20230325-regcache-sparse-sync-5d4c939a79b3

Best regards,
-- 
Mark Brown <broonie@...nel.org>