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regmap: debugfs: Ensure a correct return value for empty caches

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This should never happen in the real world.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-01-08 13:44:50 +00:00
parent 95f971c745
commit 5bd9f4bb34
1 changed files with 10 additions and 0 deletions
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10
drivers/base/regmap/regmap-debugfs.c
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@ -116,6 +116,16 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
} }
} }
/*
* This should never happen; we return above if we fail to
* allocate and we should never be in this code if there are
* no registers at all.
*/
if (list_empty(&map->debugfs_off_cache)) {
WARN_ON(list_empty(&map->debugfs_off_cache));
return base;
}
/* Find the relevant block */ /* Find the relevant block */
list_for_each_entry(c, &map->debugfs_off_cache, list) { list_for_each_entry(c, &map->debugfs_off_cache, list) {
if (from >= c->min && from <= c->max) { if (from >= c->min && from <= c->max) {