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Subject[PATCH 1/2] regmap: regcache: Fixup locking for custom lock callbacks
Date
The parameter passed to the regmap lock/unlock callbacks needs to be
map->lock_arg, regcache passes just map. This works fine in the case that no
custom locking callbacks are used, since in this case map->lock_arg equals map,
but will break when custom locking callbacks are used. The issue was introduced
in commit 0d4529c5 ("regmap: make lock/unlock functions customizable") and is
fixed by this patch.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
---
drivers/base/regmap/regcache-rbtree.c | 4 ++--
drivers/base/regmap/regcache.c | 24 ++++++++++++------------
2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 4e131c5..69b443f 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -143,7 +143,7 @@ static int rbtree_show(struct seq_file *s, void *ignored)
int registers = 0;
int this_registers, average;

- map->lock(map);
+ map->lock(map->lock_arg);

mem_size = sizeof(*rbtree_ctx);
mem_size += BITS_TO_LONGS(map->cache_present_nbits) * sizeof(long);
@@ -170,7 +170,7 @@ static int rbtree_show(struct seq_file *s, void *ignored)
seq_printf(s, "%d nodes, %d registers, average %d registers, used %zu bytes\n",
nodes, registers, average, mem_size);

- map->unlock(map);
+ map->unlock(map->lock_arg);

return 0;
}
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 8a0ab5f..4bfa219 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -270,7 +270,7 @@ int regcache_sync(struct regmap *map)

BUG_ON(!map->cache_ops || !map->cache_ops->sync);

- map->lock(map);
+ map->lock(map->lock_arg);
/* Remember the initial bypass state */
bypass = map->cache_bypass;
dev_dbg(map->dev, "Syncing %s cache\n",
@@ -306,7 +306,7 @@ out:
trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
map->cache_bypass = bypass;
- map->unlock(map);
+ map->unlock(map->lock_arg);

return ret;
}
@@ -333,7 +333,7 @@ int regcache_sync_region(struct regmap *map, unsigned int min,

BUG_ON(!map->cache_ops || !map->cache_ops->sync);

- map->lock(map);
+ map->lock(map->lock_arg);

/* Remember the initial bypass state */
bypass = map->cache_bypass;
@@ -352,7 +352,7 @@ out:
trace_regcache_sync(map->dev, name, "stop region");
/* Restore the bypass state */
map->cache_bypass = bypass;
- map->unlock(map);
+ map->unlock(map->lock_arg);

return ret;
}
@@ -378,7 +378,7 @@ int regcache_drop_region(struct regmap *map, unsigned int min,
if (!map->cache_present && !(map->cache_ops && map->cache_ops->drop))
return -EINVAL;

- map->lock(map);
+ map->lock(map->lock_arg);

trace_regcache_drop_region(map->dev, min, max);

@@ -389,7 +389,7 @@ int regcache_drop_region(struct regmap *map, unsigned int min,
if (map->cache_ops && map->cache_ops->drop)
ret = map->cache_ops->drop(map, min, max);

- map->unlock(map);
+ map->unlock(map->lock_arg);

return ret;
}
@@ -409,11 +409,11 @@ EXPORT_SYMBOL_GPL(regcache_drop_region);
*/
void regcache_cache_only(struct regmap *map, bool enable)
{
- map->lock(map);
+ map->lock(map->lock_arg);
WARN_ON(map->cache_bypass && enable);
map->cache_only = enable;
trace_regmap_cache_only(map->dev, enable);
- map->unlock(map);
+ map->unlock(map->lock_arg);
}
EXPORT_SYMBOL_GPL(regcache_cache_only);

@@ -428,9 +428,9 @@ EXPORT_SYMBOL_GPL(regcache_cache_only);
*/
void regcache_mark_dirty(struct regmap *map)
{
- map->lock(map);
+ map->lock(map->lock_arg);
map->cache_dirty = true;
- map->unlock(map);
+ map->unlock(map->lock_arg);
}
EXPORT_SYMBOL_GPL(regcache_mark_dirty);

@@ -447,11 +447,11 @@ EXPORT_SYMBOL_GPL(regcache_mark_dirty);
*/
void regcache_cache_bypass(struct regmap *map, bool enable)
{
- map->lock(map);
+ map->lock(map->lock_arg);
WARN_ON(map->cache_only && enable);
map->cache_bypass = enable;
trace_regmap_cache_bypass(map->dev, enable);
- map->unlock(map);
+ map->unlock(map->lock_arg);
}
EXPORT_SYMBOL_GPL(regcache_cache_bypass);

--
1.8.0


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