Check in regmap_raw_read() and regmap_raw_write() for correct maximum
sizes of the operations. Return -E2BIG if this size is not supported
because it is too big.
Also this patch causes an uninitialized variable warning so it
initializes ret (although not necessary).
Signed-off-by: Markus Pargmann <m...@pengutronix.de>
---
drivers/base/regmap/regmap.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index fc8084033982..650d3b12f373 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1569,6 +1569,8 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
return -EINVAL;
if (val_len % map->format.val_bytes)
return -EINVAL;
+ if (map->max_raw_write && map->max_raw_write > val_len)
+ return -E2BIG;
map->lock(map->lock_arg);
@@ -2294,6 +2296,10 @@ int regmap_raw_read(struct regmap *map, unsigned int
reg, void *val,
ret = -ENOTSUPP;
goto out;
}
+ if (map->max_raw_read && map->max_raw_read < val_len) {
+ ret = -E2BIG;
+ goto out;
+ }
/* Physical block read if there's no cache involved */
ret = _regmap_raw_read(map, reg, val, val_len);
--
2.5.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
