Building regmap.o triggers this GCC warning:
drivers/base/regmap/regmap.c: In function ‘regmap_raw_read’:
drivers/base/regmap/regmap.c:1172:6: warning: ‘ret’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
It seems 'ret' should always be set when this function returns. See, the
else-branch can leave 'ret' uninitialized only if 'val_count' is zero.
But if 'val_count' is zero regmap_volatile_range() will return true.
That implies that 'ret' will be set in the if-branch. ('val_count' could
be zero if 'val_len' is, for example, zero. That would be useless input,
however.)
Anyhow, initializing 'ret' to -EINVAL silences GCC and is harmless.
Signed-off-by: Paul Bolle <[email protected]>
---
I noticed this warning while building v3.6-rc7 on current Fedora 17,
using Fedora's default config.
drivers/base/regmap/regmap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c241ae2..025f41c 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1169,12 +1169,12 @@ int regmap_raw_read(struct regmap *map, unsigned int
reg, void *val,
size_t val_bytes = map->format.val_bytes;
size_t val_count = val_len / val_bytes;
unsigned int v;
- int ret, i;
+ int i, ret = -EINVAL;
if (val_len % map->format.val_bytes)
- return -EINVAL;
+ return ret;
if (reg % map->reg_stride)
- return -EINVAL;
+ return ret;
map->lock(map);
--
1.7.11.4
--
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