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regmap: detach regmap from dev on regmap_exit

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commit 3061e170381af96d1e66799d34264e6414d428a7 upstream.

At the end of __regmap_init(), if dev is not NULL, regmap_attach_dev()
is called, which adds a devres reference to the regmap, to be able to
retrieve a dev's regmap by name using dev_get_regmap().

When calling regmap_exit, the opposite does not happen, and the
reference is kept until the dev is detached.

Add a regmap_detach_dev() function and call it in regmap_exit() to make
sure that the devres reference is not kept.

Cc: stable@vger.kernel.org
Fixes: 72b39f6f2b ("regmap: Implement dev_get_regmap()")
Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
Rule: add
Link: https://lore.kernel.org/stable/20241128130554.362486-1-demonsingur%40gmail.com
Link: https://patch.msgid.link/20241128131625.363835-1-demonsingur@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Cosmin Tanislav 2024-11-28 15:16:23 +02:00 • committed by Greg Kroah-Hartman
parent 83df6a591a
commit f44895aa11
1 changed files with 12 additions and 0 deletions
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12
drivers/base/regmap/regmap.c
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@ -603,6 +603,17 @@ int regmap_attach_dev(struct device *dev, struct regmap *map,
}
EXPORT_SYMBOL_GPL(regmap_attach_dev);
static int dev_get_regmap_match(struct device *dev, void *res, void *data);
static int regmap_detach_dev(struct device *dev, struct regmap *map)
{
if (!dev)
return 0;
return devres_release(dev, dev_get_regmap_release,
dev_get_regmap_match, (void *)map->name);
}
static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus,
const struct regmap_config *config)
{
@ -1347,6 +1358,7 @@ void regmap_exit(struct regmap *map)
{
struct regmap_async *async;
regmap_detach_dev(map->dev, map);
regcache_exit(map);
regmap_debugfs_exit(map);
regmap_range_exit(map);