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Subject[PATCH 11/19] regmap: avoid undefined return from regmap_read_debugfs
Date
Gcc warns about the case where regmap_read_debugfs tries
to walk an empty map->debugfs_off_cache list, which results
in uninitialized variable getting returned.

Setting this variable to 0 first avoids the warning and
the potentially undefined value.

Without this patch, building mxs_defconfig results in:

drivers/base/regmap/regmap-debugfs.c: In function 'regmap_read_debugfs':
drivers/base/regmap/regmap-debugfs.c:147:9: : warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/base/regmap/regmap-debugfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 46a213a..31cc656 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -80,7 +80,7 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
{
struct regmap_debugfs_off_cache *c = NULL;
loff_t p = 0;
- unsigned int i, ret;
+ unsigned int i, ret = 0;

/*
* If we don't have a cache build one so we don't have to do a
--
1.8.0


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