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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-08 13:44:50 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-08 20:52:49 +0000 |
| commit | 5bd9f4bb34c16b62725b9486a290c01b1fdfec1c (patch) | |
| tree | eeb04f9200e5e9101aa8b723ca494b9d07c86fa5 | |
| parent | 95f971c745a343255744703dc4ae8d78508519cc (diff) | |
| download | linux-5bd9f4bb34c16b62725b9486a290c01b1fdfec1c.tar.bz2 | |
regmap: debugfs: Ensure a correct return value for empty caches
This should never happen in the real world.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 9099cd33fbcb..720e14248167 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -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 */ list_for_each_entry(c, &map->debugfs_off_cache, list) { if (from >= c->min && from <= c->max) { |