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regmap: debugfs: Discard the cache if we fail to allocate an entry 

Rather than trying to soldier on with a partially allocated cache just
throw the cache away and pretend we don't have one in case we can get a
full cache next time around.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-01-08 13:35:58 +00:00
parent 5a1d6d172b
commit 95f971c745
1 changed files with 18 additions and 11 deletions
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29
drivers/base/regmap/regmap-debugfs.c
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@ -56,6 +56,19 @@ static const struct file_operations regmap_name_fops = {
.llseek = default_llseek,
};
static void regmap_debugfs_free_dump_cache(struct regmap *map)
{
struct regmap_debugfs_off_cache *c;
while (!list_empty(&map->debugfs_off_cache)) {
c = list_first_entry(&map->debugfs_off_cache,
struct regmap_debugfs_off_cache,
list);
list_del(&c->list);
kfree(c);
}
}
/*
* Work out where the start offset maps into register numbers, bearing
* in mind that we suppress hidden registers.
@ -91,8 +104,10 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
/* No cache entry? Start a new one */
if (!c) {
c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c)
break;
if (!c) {
regmap_debugfs_free_dump_cache(map);
return base;
}
c->min = p;
c->base_reg = i;
}
@ -388,16 +403,8 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
void regmap_debugfs_exit(struct regmap *map)
{
struct regmap_debugfs_off_cache *c;
debugfs_remove_recursive(map->debugfs);
while (!list_empty(&map->debugfs_off_cache)) {
c = list_first_entry(&map->debugfs_off_cache,
struct regmap_debugfs_off_cache,
list);
list_del(&c->list);
kfree(c);
}
regmap_debugfs_free_dump_cache(map);
kfree(map->debugfs_name);
}