Messages in this thread Patch in this message | | | From | Mark Brown <> | Subject | [PATCH 1/2] regmap: Return a sensible error code if we fail to read the cache | Date | Sun, 9 Oct 2011 14:44:35 +0100 |
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If a register isn't cached then let callers know that so they can fall back or error handle appropriately.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> --- drivers/base/regmap/regcache-indexed.c | 7 +++---- drivers/base/regmap/regcache-lzo.c | 4 ++-- drivers/base/regmap/regcache-rbtree.c | 3 +-- drivers/base/regmap/regcache.c | 2 +- 4 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/base/regmap/regcache-indexed.c b/drivers/base/regmap/regcache-indexed.c index 2e10bb1..507731a 100644 --- a/drivers/base/regmap/regcache-indexed.c +++ b/drivers/base/regmap/regcache-indexed.c @@ -20,11 +20,10 @@ static int regcache_indexed_read(struct regmap *map, unsigned int reg, int ret; ret = regcache_lookup_reg(map, reg); - if (ret < 0) - *value = 0; - else + if (ret >= 0) *value = map->reg_defaults[ret].def; - return 0; + + return ret; } static int regcache_indexed_write(struct regmap *map, unsigned int reg, diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c index ad6af92..066aeec 100644 --- a/drivers/base/regmap/regcache-lzo.c +++ b/drivers/base/regmap/regcache-lzo.c @@ -232,7 +232,6 @@ static int regcache_lzo_read(struct regmap *map, size_t blksize, tmp_dst_len; void *tmp_dst; - *value = 0; /* index of the compressed lzo block */ blkindex = regcache_lzo_get_blkindex(map, reg); /* register index within the decompressed block */ @@ -261,7 +260,8 @@ static int regcache_lzo_read(struct regmap *map, /* restore the pointer and length of the compressed block */ lzo_block->dst = tmp_dst; lzo_block->dst_len = tmp_dst_len; - return 0; + + return ret; } static int regcache_lzo_write(struct regmap *map, diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index f80eebc..e314984 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -193,8 +193,7 @@ static int regcache_rbtree_read(struct regmap *map, *value = regcache_rbtree_get_register(rbnode, reg_tmp, map->cache_word_size); } else { - /* uninitialized registers default to 0 */ - *value = 0; + return -ENOENT; } return 0; diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index bf82783..67c7703 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -379,7 +379,7 @@ int regcache_lookup_reg(struct regmap *map, unsigned int reg) if (r) return r - map->reg_defaults; else - return -1; + return -ENOENT; } int regcache_insert_reg(struct regmap *map, unsigned int reg, -- 1.7.6.3
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